sequence_id stringlengths 7 7 | sequence_name stringlengths 4 573 | sequence listlengths 1 348 | keywords listlengths 1 7 | score int64 1 2.47k | offset_a int64 -14,827 666,262,453B | offset_b int64 0 635M ⌀ | cross_references listlengths 1 128 ⌀ | former_ids listlengths 1 3 ⌀ | author stringlengths 7 231 ⌀ | timestamp timestamp[us]date 1999-12-11 03:00:00 2026-01-19 02:46:49 | filename stringlengths 29 29 | hash stringlengths 32 32 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
A392449 | The number of exponential unitary (or e-unitary) divisors of n that are squares. | [
"1",
"0",
"0",
"1",
"0",
"0",
"0",
"0",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"... | [
"nonn",
"mult",
"easy",
"new"
] | 12 | 1 | 64 | [
"A010052",
"A034444",
"A056624",
"A065803",
"A068068",
"A278908",
"A323239",
"A361255",
"A384557",
"A392449"
] | null | Amiram Eldar, Jan 13 2026 | 2026-01-17T20:14:49 | oeisdata/seq/A392/A392449.seq | 93bedf4a22556ff9263ced3c5238cd9f |
A392450 | The number of exponential unitary (or e-unitary) divisors of n that are exponentially squarefree numbers (A209061). | [
"1",
"1",
"1",
"2",
"1",
"1",
"1",
"2",
"2",
"1",
"1",
"2",
"1",
"1",
"1",
"1",
"1",
"2",
"1",
"2",
"1",
"1",
"1",
"2",
"2",
"1",
"2",
"2",
"1",
"1",
"1",
"2",
"1",
"1",
"1",
"4",
"1",
"1",
"1",
"2",
"1",
"1",
"1",
"2",
"2",
"... | [
"nonn",
"mult",
"easy",
"new"
] | 8 | 1 | 4 | [
"A056624",
"A056671",
"A209061",
"A278908",
"A361177",
"A361255",
"A366309",
"A384557",
"A392450"
] | null | Amiram Eldar, Jan 13 2026 | 2026-01-14T13:33:00 | oeisdata/seq/A392/A392450.seq | 29c05f65b737fa1f8bd13375ae5eb15e |
A392451 | The number of infinitary divisors of n that are numbers whose prime factorization exponents are all powers of 2 (A138302). | [
"1",
"2",
"2",
"2",
"2",
"4",
"2",
"3",
"2",
"4",
"2",
"4",
"2",
"4",
"4",
"2",
"2",
"4",
"2",
"4",
"4",
"4",
"2",
"6",
"2",
"4",
"3",
"4",
"2",
"8",
"2",
"3",
"4",
"4",
"4",
"4",
"2",
"4",
"4",
"6",
"2",
"8",
"2",
"4",
"4",
"... | [
"nonn",
"mult",
"easy",
"new"
] | 9 | 1 | 2 | [
"A000120",
"A037445",
"A050376",
"A055076",
"A077609",
"A138302",
"A353897",
"A358260",
"A360721",
"A363825",
"A366246",
"A366247",
"A366308",
"A366309",
"A368883",
"A392451",
"A392452"
] | null | Amiram Eldar, Jan 13 2026 | 2026-01-15T09:38:37 | oeisdata/seq/A392/A392451.seq | 17e2370c0e7f4a0bb51c889b27607141 |
A392452 | The number of coreful infinitary divisors of n that are numbers whose prime factorization exponents are all powers of 2 (A138302). | [
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"2",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"2",
"1",
"1",
"2",
"1",
"1",
"1",
"1",
"2",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"2",
"1",
"1",
"1",
"1",
"1",
"... | [
"nonn",
"mult",
"easy",
"new"
] | 7 | 1 | 8 | [
"A000120",
"A037445",
"A077609",
"A138302",
"A284318",
"A307958",
"A353897",
"A359411",
"A363329",
"A367516",
"A368979",
"A382291",
"A384557",
"A392451",
"A392452"
] | null | Amiram Eldar, Jan 13 2026 | 2026-01-15T09:38:34 | oeisdata/seq/A392/A392452.seq | 8c2d4df900bc97aabad3186e92dc98ff |
A392454 | a(n) = Sum_{k=0..floor(2*n/3)} binomial(2*k+1,2*n-3*k). | [
"1",
"0",
"3",
"2",
"10",
"12",
"36",
"57",
"138",
"250",
"549",
"1060",
"2227",
"4427",
"9120",
"18364",
"37513",
"75949",
"154603",
"313701",
"637699",
"1295022",
"2631240",
"5344988",
"10858285",
"22058847",
"44810670",
"91034937",
"184929945",
"375691009... | [
"nonn",
"easy",
"new"
] | 21 | 0 | 3 | [
"A376716",
"A376787",
"A376788",
"A392428",
"A392454",
"A392455",
"A392456"
] | null | Seiichi Manyama, Jan 13 2026 | 2026-01-14T10:39:30 | oeisdata/seq/A392/A392454.seq | 8fd18d9bf7ef287c297f4d7a7e6b5455 |
A392455 | a(n) = Sum_{k=0..floor(2*n/5)} binomial(2*k+1,2*n-5*k). | [
"1",
"0",
"0",
"3",
"1",
"1",
"10",
"5",
"7",
"35",
"22",
"37",
"126",
"95",
"174",
"463",
"408",
"770",
"1732",
"1742",
"3290",
"6584",
"7385",
"13760",
"25384",
"31078",
"56786",
"99043",
"129886",
"232393",
"390242",
"539558",
"946121",
"1549554",... | [
"nonn",
"easy",
"new"
] | 22 | 0 | 4 | [
"A376716",
"A376787",
"A376788",
"A392429",
"A392454",
"A392455",
"A392456"
] | null | Seiichi Manyama, Jan 13 2026 | 2026-01-14T10:39:34 | oeisdata/seq/A392/A392455.seq | 23d4b504b47d9d77a4c13e9a96d57eb3 |
A392456 | a(n) = Sum_{k=0..floor(2*n/7)} binomial(2*k+1,2*n-7*k). | [
"1",
"0",
"0",
"0",
"3",
"1",
"0",
"1",
"10",
"5",
"0",
"7",
"35",
"21",
"2",
"36",
"126",
"84",
"20",
"165",
"462",
"331",
"133",
"716",
"1716",
"1302",
"741",
"3016",
"6436",
"5141",
"3745",
"12481",
"24330",
"20417",
"17816",
"51069",
"92605... | [
"nonn",
"easy",
"new"
] | 16 | 0 | 5 | [
"A376716",
"A376787",
"A376788",
"A392430",
"A392454",
"A392455",
"A392456"
] | null | Seiichi Manyama, Jan 13 2026 | 2026-01-13T23:25:18 | oeisdata/seq/A392/A392456.seq | 569ac71fc1d061223831278fbaa65669 |
A392469 | Primes p that set records for the minimum k in the Erdős-Straus y = k*p construction for 4/p = 1/x + 1/y + 1/z. | [
"73",
"193",
"1201",
"2521",
"3361",
"33289",
"90841",
"144169",
"167521",
"225289",
"361321",
"915961",
"954409",
"1853329",
"2031121",
"605531161",
"6736278481",
"11602225441",
"24707638729",
"49563785881",
"133050918961",
"189241671529"
] | [
"nonn",
"hard",
"more",
"new"
] | 8 | 1 | 1 | [
"A073101",
"A075245",
"A075246",
"A075247",
"A075248",
"A192789",
"A287116",
"A392469"
] | null | Jeffrey H. Gold, Jan 13 2026 | 2026-01-18T20:56:34 | oeisdata/seq/A392/A392469.seq | a1a6d1ee3844b6882b7d773823c57694 |
A392470 | Record values of minimum k in the Erdős-Straus y = k*p construction for 4/p = 1/x + 1/y + 1/z. | [
"2",
"4",
"8",
"12",
"25",
"39",
"42",
"48",
"65",
"70",
"72",
"76",
"84",
"96",
"624",
"816",
"950",
"957",
"966",
"990",
"1484",
"1833"
] | [
"nonn",
"hard",
"more",
"new"
] | 8 | 1 | 1 | [
"A073101",
"A075245",
"A075246",
"A392469",
"A392470"
] | null | Jeffrey H. Gold, Jan 13 2026 | 2026-01-18T21:00:38 | oeisdata/seq/A392/A392470.seq | 25dd17e0a558a6b83346d8c7d072fbdb |
A392472 | Decimal expansion of the number whose continued fraction coefficients are given in A072193. | [
"4",
"4",
"0",
"3",
"3",
"8",
"8",
"2",
"6",
"2",
"5",
"1",
"9",
"7",
"1",
"1",
"3",
"0",
"9",
"3",
"3",
"7",
"8",
"9",
"3",
"3",
"3",
"6",
"6",
"5",
"4",
"2",
"9",
"1",
"2",
"9",
"4",
"3",
"9",
"5",
"5",
"7",
"7",
"3",
"5",
"... | [
"cons",
"nonn",
"new"
] | 6 | 0 | 1 | [
"A072193",
"A391714",
"A391715",
"A392472"
] | null | Jwalin Bhatt, Jan 13 2026 | 2026-01-15T17:55:01 | oeisdata/seq/A392/A392472.seq | 0fa95c0464af189b5cc2f76ea170cd2b |
A392473 | a(0) = 0, a(1) = 1; otherwise, a(n) = a(n-1) + a(m), where m is the greatest square < n. | [
"0",
"1",
"2",
"3",
"4",
"8",
"12",
"16",
"20",
"24",
"48",
"72",
"96",
"120",
"144",
"168",
"192",
"384",
"576",
"768",
"960",
"1152",
"1344",
"1536",
"1728",
"1920",
"3840",
"5760",
"7680",
"9600",
"11520",
"13440",
"15360",
"17280",
"19200",
"... | [
"nonn",
"new"
] | 6 | 0 | 3 | null | null | Robert Israel, Jan 13 2026 | 2026-01-18T15:07:34 | oeisdata/seq/A392/A392473.seq | c787c090f655f75a5d2ceb6308a9c8e5 |
A392477 | A modified Sisyphus function: a(n) = concatenation of (number of odd digits in n) (number of even digits in n) (number of digits in n). | [
"11",
"101",
"11",
"101",
"11",
"101",
"11",
"101",
"11",
"101",
"112",
"202",
"112",
"202",
"112",
"202",
"112",
"202",
"112",
"202",
"22",
"112",
"22",
"112",
"22",
"112",
"22",
"112",
"22",
"112",
"112",
"202",
"112",
"202",
"112",
"202",
"1... | [
"nonn",
"base",
"easy",
"new"
] | 8 | 0 | 1 | [
"A055642",
"A073053",
"A171797",
"A196563",
"A196564",
"A308003",
"A308005",
"A392220",
"A392477"
] | null | Paolo Xausa, Jan 13 2026 | 2026-01-18T19:46:09 | oeisdata/seq/A392/A392477.seq | 8e8985f0766cf30ae6a8358d4af6c44e |
A392481 | Numbers k such that both (3*k-3)^2 + k^2 and (3*k)^2 + (k+1)^2 are prime. | [
"10",
"16",
"85",
"169",
"211",
"229",
"289",
"349",
"361",
"445",
"451",
"484",
"544",
"700",
"826",
"835",
"844",
"955",
"1066",
"1111",
"1156",
"1231",
"1351",
"1420",
"1480",
"1501",
"1576",
"1855",
"1945",
"2044",
"2050",
"2086",
"2116",
"2161",... | [
"nonn",
"new"
] | 10 | 1 | 1 | null | null | Will Gosnell and Robert Israel, Jan 13 2026 | 2026-01-15T17:50:15 | oeisdata/seq/A392/A392481.seq | 72084001f3fc541f7856f442f0fae579 |
A392487 | a(n) = Sum_{k=0..floor((2*n+1)/5)} binomial(2*k+1,2*n-5*k+1). | [
"1",
"0",
"1",
"3",
"0",
"5",
"10",
"2",
"21",
"35",
"16",
"84",
"127",
"91",
"331",
"475",
"451",
"1299",
"1821",
"2080",
"5100",
"7116",
"9192",
"20074",
"28201",
"39529",
"79292",
"112864",
"166922",
"314413",
"454657",
"696123",
"1251461",
"18391... | [
"nonn",
"easy",
"new"
] | 12 | 0 | 4 | [
"A392455",
"A392487"
] | null | Seiichi Manyama, Jan 14 2026 | 2026-01-15T16:44:04 | oeisdata/seq/A392/A392487.seq | fd7b6b99ac46bc6b3cc6b0c0a24caae6 |
A392488 | a(n) = Sum_{k=0..floor((2*n+1)/7)} binomial(2*k+1,2*n-7*k+1). | [
"1",
"0",
"0",
"1",
"3",
"0",
"0",
"5",
"10",
"1",
"1",
"21",
"35",
"7",
"9",
"84",
"126",
"37",
"56",
"330",
"462",
"178",
"297",
"1287",
"1717",
"820",
"1443",
"5006",
"6452",
"3683",
"6643",
"19464",
"24481",
"16252",
"29512",
"75739",
"9370... | [
"nonn",
"easy",
"new"
] | 9 | 0 | 5 | [
"A392456",
"A392488"
] | null | Seiichi Manyama, Jan 14 2026 | 2026-01-14T10:36:52 | oeisdata/seq/A392/A392488.seq | b4f9ec7821cf3bf5f4b188d4f6857a22 |
A392489 | a(n) = Sum_{k=0..floor(n/2)} binomial(k+1,2*n-4*k+1). | [
"1",
"0",
"2",
"0",
"3",
"1",
"4",
"4",
"5",
"10",
"7",
"20",
"13",
"35",
"29",
"57",
"65",
"92",
"136",
"156",
"264",
"285",
"484",
"550",
"860",
"1079",
"1521",
"2092",
"2732",
"3965",
"5022",
"7359",
"9404",
"13485",
"17751",
"24633",
"33457... | [
"nonn",
"easy",
"new"
] | 16 | 0 | 3 | [
"A005314",
"A122514",
"A390020",
"A392489",
"A392490",
"A392491"
] | null | Seiichi Manyama, Jan 14 2026 | 2026-01-14T10:36:49 | oeisdata/seq/A392/A392489.seq | 5ead9074985d2ff36864a2c2c7a60898 |
A392490 | a(n) = Sum_{k=0..floor(n/3)} binomial(k+1,2*n-6*k+1). | [
"1",
"0",
"0",
"2",
"0",
"0",
"3",
"1",
"0",
"4",
"4",
"0",
"5",
"10",
"1",
"6",
"20",
"6",
"7",
"35",
"21",
"9",
"56",
"56",
"17",
"84",
"126",
"46",
"121",
"252",
"131",
"175",
"462",
"342",
"275",
"793",
"805",
"506",
"1299",
"1730",
... | [
"nonn",
"easy",
"new"
] | 14 | 0 | 4 | [
"A005314",
"A390020",
"A390662",
"A392489",
"A392490",
"A392491"
] | null | Seiichi Manyama, Jan 14 2026 | 2026-01-14T10:35:29 | oeisdata/seq/A392/A392490.seq | 8f9457c975f0a38251916e6e01f630bc |
A392491 | a(n) = Sum_{k=0..floor(n/4)} binomial(k+1,2*n-8*k+1). | [
"1",
"0",
"0",
"0",
"2",
"0",
"0",
"0",
"3",
"1",
"0",
"0",
"4",
"4",
"0",
"0",
"5",
"10",
"1",
"0",
"6",
"20",
"6",
"0",
"7",
"35",
"21",
"1",
"8",
"56",
"56",
"8",
"9",
"84",
"126",
"36",
"11",
"120",
"252",
"120",
"21",
"165",
"4... | [
"nonn",
"easy",
"new"
] | 17 | 0 | 5 | [
"A005314",
"A390662",
"A390688",
"A392489",
"A392490",
"A392491"
] | null | Seiichi Manyama, Jan 14 2026 | 2026-01-15T16:44:12 | oeisdata/seq/A392/A392491.seq | e18b94a5e4cafbb44364b1c894769655 |
A392506 | Numbers k such that the abundancy index of sigma(k) is equal to the abundancy index of d(k). | [
"1",
"12",
"90",
"63984",
"34486284",
"38879508",
"59516499",
"64584129",
"3442630275",
"3446797725",
"3740280975",
"3825088428",
"4367111052",
"4370380428",
"4370567052",
"4370699028",
"6141938475",
"6905514891",
"6956741451"
] | [
"nonn",
"more",
"new"
] | 26 | 1 | 2 | [
"A000005",
"A000203",
"A081357",
"A392506"
] | null | Leo Hennig, Jan 14 2026 | 2026-01-15T10:22:41 | oeisdata/seq/A392/A392506.seq | 21811701c0df25376e61a891d4e93502 |
A392507 | Numbers k such that the abundancy index of sigma(k) divided by the abundancy index of d(k) equals a whole number. | [
"1",
"12",
"90",
"2878",
"3118",
"3595",
"3949",
"4063",
"4117",
"4183",
"4187",
"4189",
"4279",
"4427",
"18716",
"19653",
"24323",
"25093",
"25813",
"25853",
"63984",
"156664",
"163190",
"171346",
"183585",
"187634",
"191666",
"192826",
"193234",
"193486",
... | [
"nonn",
"new"
] | 16 | 1 | 2 | [
"A000005",
"A000203",
"A081357",
"A392506",
"A392507"
] | null | Leo Hennig, Jan 14 2026 | 2026-01-15T10:22:52 | oeisdata/seq/A392/A392507.seq | 98cd98ee4cd0f2a0cb3c9e5b88ef5e3e |
A392524 | G.f. satisfies: A(x) = A( x^3 + 12*x*A(x)^3 )^(1/3), with A(0)=0, A'(0)=1. | [
"1",
"4",
"32",
"300",
"3024",
"31808",
"344272",
"3804736",
"42731520",
"486196388",
"5591900496",
"64906709504",
"759393411472",
"8946845132800",
"106061761136640",
"1264308532444800",
"15146665392520960",
"182284541676200960",
"2202815088345640160",
"26720851036753899840",
... | [
"nonn",
"new"
] | 15 | 1 | 2 | [
"A271934",
"A377106",
"A392524",
"A392525"
] | null | Paul D. Hanna, Jan 15 2026 | 2026-01-16T10:01:42 | oeisdata/seq/A392/A392524.seq | 45e2ea142be74895efd780fe97338e0b |
A392525 | G.f. satisfies: A(x) = A( x^3 + 15*x*A(x)^3 )^(1/3), with A(0)=0, A'(0)=1. | [
"1",
"5",
"50",
"585",
"7350",
"96250",
"1295500",
"17785625",
"247893750",
"3496975070",
"49822163300",
"715783838250",
"10357691059300",
"150824505084500",
"2208488923375000",
"32499586653582625",
"480405878209083750",
"7130311697477968750",
"106224874791538636100",
"15879242... | [
"nonn",
"new"
] | 15 | 1 | 2 | [
"A271934",
"A377106",
"A392524",
"A392525"
] | null | Paul D. Hanna, Jan 15 2026 | 2026-01-16T10:01:37 | oeisdata/seq/A392/A392525.seq | 05fd8470dd6f72dc099a4504d502d61e |
A392534 | a(n) is the least number k such that j * n! + 1 is prime for all j from k to k + n - 1. | [
"1",
"1",
"1",
"87",
"1436",
"28065",
"24152",
"3049073",
"388515788"
] | [
"nonn",
"hard",
"more",
"new"
] | 24 | 1 | 4 | null | null | Robert Israel, Jan 15 2026 | 2026-01-17T23:12:04 | oeisdata/seq/A392/A392534.seq | fafb07f86665c119733c140856ea3711 |
A392535 | Numbers k such that 2^k + 2*k - 3 is prime. | [
"2",
"3",
"6",
"7",
"8",
"20",
"26",
"27",
"32",
"39",
"63",
"81",
"98",
"111",
"127",
"134",
"138",
"410",
"470",
"686",
"759",
"1005",
"1026",
"1386",
"2078",
"2647",
"2970",
"3439",
"7807",
"8684",
"15369",
"27471",
"42391",
"75859",
"77930",
... | [
"nonn",
"more",
"hard",
"new"
] | 14 | 1 | 1 | [
"A066229",
"A100359",
"A100361",
"A301634",
"A301744",
"A392535"
] | null | Max Alekseyev, Jan 15 2026 | 2026-01-16T10:02:28 | oeisdata/seq/A392/A392535.seq | a1b9b4109a41612e7e437504c964057c |
A392540 | Expansion of 1 / ((1-x)^2 - x^5). | [
"1",
"2",
"3",
"4",
"5",
"7",
"11",
"18",
"29",
"45",
"68",
"102",
"154",
"235",
"361",
"555",
"851",
"1301",
"1986",
"3032",
"4633",
"7085",
"10838",
"16577",
"25348",
"38752",
"59241",
"90568",
"138472",
"211724",
"323728",
"494973",
"756786",
"115... | [
"nonn",
"easy",
"new"
] | 14 | 0 | 2 | [
"A003520",
"A049016",
"A390044",
"A392540"
] | null | Seiichi Manyama, Jan 15 2026 | 2026-01-16T09:13:37 | oeisdata/seq/A392/A392540.seq | 64e01edbfc360e6fb75e8397ff611dff |
A392541 | Expansion of 1 / ((1-x)^2 - x^6). | [
"1",
"2",
"3",
"4",
"5",
"6",
"8",
"12",
"19",
"30",
"46",
"68",
"98",
"140",
"201",
"292",
"429",
"634",
"937",
"1380",
"2024",
"2960",
"4325",
"6324",
"9260",
"13576",
"19916",
"29216",
"42841",
"62790",
"91999",
"134784",
"197485",
"289402",
"42... | [
"nonn",
"easy",
"new"
] | 19 | 0 | 2 | [
"A005708",
"A192080",
"A375278",
"A376785",
"A390045",
"A392541",
"A392542"
] | null | Seiichi Manyama, Jan 15 2026 | 2026-01-16T15:03:48 | oeisdata/seq/A392/A392541.seq | df4e77e4279709619b688a68400263db |
A392542 | Expansion of 1 / ((1-x)^4 - x^6). | [
"1",
"4",
"10",
"20",
"35",
"56",
"85",
"128",
"201",
"340",
"616",
"1156",
"2172",
"4004",
"7193",
"12620",
"21782",
"37332",
"64095",
"110900",
"193769",
"341344",
"604049",
"1069640",
"1889968",
"3327784",
"5839608",
"10223304",
"17880785",
"31283604",
... | [
"nonn",
"easy",
"new"
] | 17 | 0 | 2 | [
"A005708",
"A192080",
"A390045",
"A392541",
"A392542"
] | null | Seiichi Manyama, Jan 15 2026 | 2026-01-16T16:01:10 | oeisdata/seq/A392/A392542.seq | 170eb18b3a6ab0823e594368213acbf8 |
A392543 | Expansion of 1 / ((1-x)^2 - x^7). | [
"1",
"2",
"3",
"4",
"5",
"6",
"7",
"9",
"13",
"20",
"31",
"47",
"69",
"98",
"136",
"187",
"258",
"360",
"509",
"727",
"1043",
"1495",
"2134",
"3031",
"4288",
"6054",
"8547",
"12083",
"17114",
"24279",
"34475",
"48959",
"69497",
"98582",
"139750",
... | [
"nonn",
"easy",
"new"
] | 19 | 0 | 2 | [
"A005709",
"A049017",
"A392543",
"A392544",
"A392545",
"A392546",
"A392547"
] | null | Seiichi Manyama, Jan 15 2026 | 2026-01-18T14:16:07 | oeisdata/seq/A392/A392543.seq | 0162320a6d555e1abb3b16043fe99119 |
A392544 | Expansion of 1 / ((1-x)^3 - x^7). | [
"1",
"3",
"6",
"10",
"15",
"21",
"28",
"37",
"51",
"76",
"122",
"204",
"343",
"567",
"913",
"1432",
"2200",
"3339",
"5053",
"7685",
"11802",
"18317",
"28662",
"45037",
"70781",
"110947",
"173220",
"269402",
"417810",
"647106",
"1002327",
"1554254",
"24... | [
"nonn",
"easy",
"new"
] | 14 | 0 | 2 | [
"A005709",
"A049017",
"A392543",
"A392544",
"A392545",
"A392546",
"A392547"
] | null | Seiichi Manyama, Jan 15 2026 | 2026-01-16T09:15:11 | oeisdata/seq/A392/A392544.seq | deadca914d56c01c96d922d634609319 |
A392545 | Expansion of 1 / ((1-x)^4 - x^7). | [
"1",
"4",
"10",
"20",
"35",
"56",
"84",
"121",
"173",
"256",
"406",
"694",
"1247",
"2276",
"4113",
"7263",
"12487",
"20952",
"34519",
"56296",
"91667",
"150129",
"248442",
"415853",
"702561",
"1193284",
"2029036",
"3442498",
"5816480",
"9782234",
"16386865... | [
"nonn",
"easy",
"new"
] | 14 | 0 | 2 | [
"A005709",
"A049017",
"A392543",
"A392544",
"A392545",
"A392546",
"A392547"
] | null | Seiichi Manyama, Jan 15 2026 | 2026-01-16T09:14:59 | oeisdata/seq/A392/A392545.seq | 30cbe4100fd2d584705697775ea5d8ce |
A392546 | Expansion of 1 / ((1-x)^5 - x^7). | [
"1",
"5",
"15",
"35",
"70",
"126",
"210",
"331",
"505",
"770",
"1221",
"2080",
"3822",
"7385",
"14501",
"28201",
"53585",
"99043",
"178335",
"314413",
"546806",
"946121",
"1642244",
"2877925",
"5107821",
"9176831",
"16634509",
"30281870",
"55117511",
"999798... | [
"nonn",
"easy",
"new"
] | 14 | 0 | 2 | [
"A005709",
"A049016",
"A049017",
"A079675",
"A368475",
"A369803",
"A369804",
"A390045",
"A392543",
"A392544",
"A392545",
"A392546",
"A392547"
] | null | Seiichi Manyama, Jan 15 2026 | 2026-01-16T09:14:48 | oeisdata/seq/A392/A392546.seq | 937efb873279f5c9c7a9afa76e06e4f8 |
A392547 | Expansion of 1 / ((1-x)^6 - x^7). | [
"1",
"6",
"21",
"56",
"126",
"252",
"462",
"793",
"1299",
"2080",
"3367",
"5733",
"10556",
"20944",
"43453",
"91104",
"188480",
"380190",
"745066",
"1420916",
"2650221",
"4869285",
"8888489",
"16261025",
"30031820",
"56231526",
"106791426",
"205108561",
"39648... | [
"nonn",
"easy",
"new"
] | 13 | 0 | 2 | [
"A005709",
"A049017",
"A392543",
"A392544",
"A392545",
"A392546",
"A392547"
] | null | Seiichi Manyama, Jan 15 2026 | 2026-01-16T09:14:37 | oeisdata/seq/A392/A392547.seq | f9f2d097d4c86ffd1954af5d2e5a708c |
A392552 | Expansion of 1 / ((1-x)^2 - x^4)^2. | [
"1",
"4",
"10",
"20",
"37",
"68",
"126",
"232",
"420",
"748",
"1318",
"2308",
"4023",
"6980",
"12054",
"20728",
"35515",
"60664",
"103340",
"175600",
"297704",
"503656",
"850460",
"1433560",
"2412573",
"4054148",
"6803298",
"11402028",
"19086465",
"31914204"... | [
"nonn",
"easy",
"new"
] | 12 | 0 | 2 | [
"A024490",
"A292324",
"A392552"
] | null | Seiichi Manyama, Jan 16 2026 | 2026-01-16T09:14:27 | oeisdata/seq/A392/A392552.seq | b95422f34d0ce1b85e267c8940fd64e4 |
A392553 | Expansion of 1 / ((1-x)^2 - x^5)^2. | [
"1",
"4",
"10",
"20",
"35",
"58",
"96",
"162",
"277",
"472",
"793",
"1312",
"2147",
"3494",
"5674",
"9202",
"14893",
"24032",
"38651",
"61976",
"99136",
"158274",
"252282",
"401518",
"638078",
"1012526",
"1604489",
"2539302",
"4014105",
"6338710",
"9999569... | [
"nonn",
"easy",
"new"
] | 14 | 0 | 2 | [
"A137361",
"A292325",
"A392540",
"A392553"
] | null | Seiichi Manyama, Jan 16 2026 | 2026-01-16T09:14:10 | oeisdata/seq/A392/A392553.seq | 53239306a2298f9015da6fabfbee43b7 |
A392554 | Expansion of 1 / ((1-x)^2 - x^6)^2. | [
"1",
"4",
"10",
"20",
"35",
"56",
"86",
"132",
"207",
"332",
"538",
"868",
"1382",
"2168",
"3362",
"5180",
"7965",
"12252",
"18858",
"29012",
"44552",
"68232",
"104202",
"158748",
"241412",
"366664",
"556384",
"843552",
"1277763",
"1933512",
"2922672",
"... | [
"nonn",
"easy",
"new"
] | 13 | 0 | 2 | [
"A392541",
"A392554"
] | null | Seiichi Manyama, Jan 16 2026 | 2026-01-16T09:14:00 | oeisdata/seq/A392/A392554.seq | edfab3dddfb25c7ef0f55db3c5f2a04b |
A392555 | Numbers k such that k and k+2 are both 3-abundant numbers (A068403). | [
"41509500030",
"53751301758",
"77545516048",
"115021477998",
"206704495998",
"252375798400",
"484648516350",
"624285133470",
"847528356400",
"859086855198",
"1040297484798",
"1288792078000",
"1386296806048",
"1409258575998",
"1631180701150",
"1637022875488",
"1682804950398",
"17515... | [
"nonn",
"new"
] | 5 | 1 | 1 | [
"A000203",
"A068403",
"A231086",
"A392555"
] | null | Amiram Eldar, Jan 16 2026 | 2026-01-16T10:44:07 | oeisdata/seq/A392/A392555.seq | 2b0f287fe6fc4e418605546d18e57735 |
A392556 | Carmichael numbers k such that (p+1)/2 divides k-1 for any prime p dividing k. | [
"28295303263921",
"443372888629441",
"582920080863121",
"894221105778001",
"2013745337604001",
"39671149333495681",
"842526563598720001",
"2380296518909971201",
"3188618003602886401",
"13568642099913864601",
"31995444290475065401",
"33711266676317630401",
"54764632857801026161",
"563035230... | [
"nonn",
"new"
] | 10 | 1 | 1 | [
"A002997",
"A392556",
"A392557"
] | null | Amiram Eldar, Jan 16 2026 | 2026-01-16T10:44:04 | oeisdata/seq/A392/A392556.seq | bfcd946545231450cbb5f532367c393b |
A392557 | Composite squarefree numbers k such that for any prime p dividing k both (p-1)/2 and (p+1)/2 divide k+1. | [
"35",
"6479",
"84419",
"1930499",
"7110179",
"15857855",
"63278892599",
"79397009999"
] | [
"nonn",
"more",
"new"
] | 6 | 1 | 1 | [
"A006972",
"A120944",
"A175530",
"A217120",
"A392556",
"A392557"
] | null | Amiram Eldar, Jan 16 2026 | 2026-01-16T10:03:26 | oeisdata/seq/A392/A392557.seq | 56d889327babf2fd8d6ec2e67dd5e0ca |
A392576 | Decimal expansion of (3 - e)/(6*(e - 2)). | [
"0",
"6",
"5",
"3",
"6",
"8",
"5",
"3",
"1",
"8",
"6",
"2",
"8",
"8",
"8",
"8",
"0",
"2",
"3",
"9",
"6",
"0",
"9",
"2",
"1",
"4",
"6",
"4",
"1",
"3",
"3",
"0",
"2",
"7",
"5",
"4",
"7",
"2",
"8",
"9",
"9",
"6",
"3",
"9",
"7",
"... | [
"nonn",
"cons",
"easy",
"new"
] | 5 | 0 | 2 | [
"A001113",
"A153805",
"A392576"
] | null | Stefano Spezia, Jan 17 2026 | 2026-01-18T23:47:06 | oeisdata/seq/A392/A392576.seq | c0264dacf41259d3757a5e79217476e5 |
A392578 | Expansion of 1 / ((1-x)^3 - x)^2. | [
"1",
"8",
"42",
"186",
"755",
"2910",
"10839",
"39404",
"140673",
"495184",
"1723612",
"5944602",
"20346280",
"69189414",
"233985831",
"787511074",
"2639382314",
"8813359530",
"29332784333",
"97339342482",
"322162413585",
"1063707837534",
"3504495947139",
"1152303242884... | [
"nonn",
"easy",
"new"
] | 18 | 0 | 2 | [
"A052529",
"A392578"
] | null | Seiichi Manyama, Jan 17 2026 | 2026-01-18T03:37:29 | oeisdata/seq/A392/A392578.seq | 585078784070a9cf7d366ffea8fbc94c |
A392579 | Expansion of 1 / ((1-x)^4 - x)^2. | [
"1",
"10",
"63",
"328",
"1551",
"6936",
"29915",
"125784",
"518994",
"2110412",
"8482705",
"33775188",
"133430068",
"523642612",
"2043423819",
"7935173028",
"30683010755",
"118196391378",
"453794172258",
"1737066730472",
"6631442585508",
"25254895540622",
"95967876337585"... | [
"nonn",
"easy",
"new"
] | 17 | 0 | 2 | [
"A055991",
"A392579"
] | null | Seiichi Manyama, Jan 17 2026 | 2026-01-18T14:14:29 | oeisdata/seq/A392/A392579.seq | 36b988418bf97416f28652b2ad67c7a4 |
A392580 | Expansion of 1 / ((1-x)^5 - x)^2. | [
"1",
"12",
"88",
"524",
"2810",
"14198",
"69068",
"327240",
"1520519",
"6959930",
"31481251",
"141026720",
"626718340",
"2766392924",
"12140992660",
"53019325740",
"230531058085",
"998541027120",
"4310535651374",
"18551666137480",
"79625914121555",
"340925818470230",
"145... | [
"nonn",
"easy",
"new"
] | 13 | 0 | 2 | [
"A079675",
"A392580"
] | null | Seiichi Manyama, Jan 17 2026 | 2026-01-17T11:02:06 | oeisdata/seq/A392/A392580.seq | a9a8c8e451e04c1fd65c814b959745ec |
A392581 | Expansion of 1 / ((1-x)^3 - x^2)^2. | [
"1",
"6",
"23",
"74",
"219",
"618",
"1690",
"4518",
"11873",
"30786",
"78972",
"200798",
"506808",
"1271196",
"3171395",
"7875256",
"19476285",
"47993386",
"117886221",
"288733122",
"705352042",
"1719084784",
"4180830915",
"10148032164",
"24588103912",
"59477665356"... | [
"nonn",
"new"
] | 17 | 0 | 2 | [
"A095263",
"A392581"
] | null | Seiichi Manyama, Jan 17 2026 | 2026-01-18T14:14:33 | oeisdata/seq/A392/A392581.seq | 046799ac43fa063c677829597fbdb62a |
A392582 | Expansion of 1 / ((1-x)^4 - x^2)^2. | [
"1",
"8",
"38",
"144",
"489",
"1568",
"4858",
"14696",
"43660",
"127880",
"370330",
"1062560",
"3025355",
"8558080",
"24074610",
"67398344",
"187892467",
"521862592",
"1444673876",
"3987511216",
"10976937752",
"30145183792",
"82605180884",
"225908178880",
"61668624856... | [
"nonn",
"easy",
"new"
] | 14 | 0 | 2 | [
"A290890",
"A392582"
] | null | Seiichi Manyama, Jan 17 2026 | 2026-01-17T11:02:03 | oeisdata/seq/A392/A392582.seq | 4cc22b27e82adff260ba781c35e33863 |
A392583 | Expansion of 1 / ((1-x)^5 - x^2)^2. | [
"1",
"10",
"57",
"250",
"958",
"3422",
"11759",
"39416",
"129700",
"420542",
"1347449",
"4275770",
"13460154",
"42089400",
"130860258",
"404848066",
"1247092849",
"3826948536",
"11704162210",
"35687710162",
"108522683624",
"329199712980",
"996399154254",
"3009727674010"... | [
"nonn",
"easy",
"new"
] | 14 | 0 | 2 | [
"A369803",
"A392583"
] | null | Seiichi Manyama, Jan 17 2026 | 2026-01-17T11:02:00 | oeisdata/seq/A392/A392583.seq | bd6a8f3acbb2b740406a1d30b90ac460 |
A392584 | Expansion of 1 / ((1-x)^3 - x^3)^2. | [
"1",
"6",
"21",
"58",
"144",
"342",
"795",
"1818",
"4095",
"9104",
"20028",
"43692",
"94661",
"203886",
"436905",
"932070",
"1980648",
"4194306",
"8854639",
"18641346",
"39146835",
"82021948",
"171500436",
"357913944",
"745654041",
"1550960406",
"3221225469",
"6... | [
"nonn",
"easy",
"new"
] | 13 | 0 | 2 | [
"A024495",
"A392584"
] | null | Seiichi Manyama, Jan 17 2026 | 2026-01-17T11:01:57 | oeisdata/seq/A392/A392584.seq | bd40cd31ccb4170f0bad1ddf8a32094c |
A392585 | Expansion of 1 / ((1-x)^4 - x^3)^2. | [
"1",
"8",
"36",
"122",
"354",
"948",
"2447",
"6210",
"15579",
"38644",
"94804",
"230340",
"555265",
"1330124",
"3169602",
"7518618",
"17762843",
"41813520",
"98111667",
"229548124",
"535677447",
"1247144584",
"2897380069",
"6718133382",
"15549483240",
"35930986632",... | [
"nonn",
"easy",
"new"
] | 13 | 0 | 2 | [
"A290998",
"A392585"
] | null | Seiichi Manyama, Jan 17 2026 | 2026-01-17T11:01:54 | oeisdata/seq/A392/A392585.seq | e7a6752fcbdc7473dd97758d9495890e |
A392586 | Expansion of 1 / ((1-x)^5 - x^3)^2. | [
"1",
"10",
"55",
"222",
"745",
"2242",
"6368",
"17620",
"48196",
"130764",
"351603",
"936312",
"2471315",
"6475382",
"16869560",
"43743510",
"112972715",
"290707910",
"745596747",
"1906567180",
"4862211637",
"12369960558",
"31401917375",
"79557504926",
"201193695959",... | [
"nonn",
"easy",
"new"
] | 13 | 0 | 2 | [
"A369804",
"A392586"
] | null | Seiichi Manyama, Jan 17 2026 | 2026-01-17T11:01:50 | oeisdata/seq/A392/A392586.seq | 6ccbca5cccd8c86ee30288d10ac6495e |
A392587 | Expansion of 1 / ((1-x)^3 - x^4)^2. | [
"1",
"6",
"21",
"56",
"128",
"270",
"552",
"1122",
"2280",
"4612",
"9243",
"18330",
"36027",
"70352",
"136752",
"264860",
"511280",
"983796",
"1887232",
"3610248",
"6889317",
"13117918",
"24928625",
"47287656",
"89551088",
"169324234",
"319698936",
"602813046",
... | [
"nonn",
"easy",
"new"
] | 14 | 0 | 2 | [
"A107068",
"A292324",
"A392552",
"A392587",
"A392588",
"A392589"
] | null | Seiichi Manyama, Jan 17 2026 | 2026-01-17T10:45:37 | oeisdata/seq/A392/A392587.seq | 2bdf3e0272e3584f257ab7d6f14a1579 |
A392588 | Expansion of 1 / ((1-x)^4 - x^4)^2. | [
"1",
"8",
"36",
"120",
"332",
"816",
"1872",
"4160",
"9168",
"20224",
"44608",
"97920",
"213184",
"460032",
"985344",
"2099200",
"4455680",
"9431040",
"19911680",
"41932800",
"88083456",
"184578048",
"385929216",
"805355520",
"1677709312",
"3489529856",
"724751155... | [
"nonn",
"easy",
"new"
] | 13 | 0 | 2 | [
"A000749",
"A392588"
] | null | Seiichi Manyama, Jan 17 2026 | 2026-01-17T10:45:34 | oeisdata/seq/A392/A392588.seq | df5b1081e2d3b9226be2a9ce4ff578e9 |
A392589 | Expansion of 1 / ((1-x)^5 - x^4)^2. | [
"1",
"10",
"55",
"220",
"717",
"2032",
"5245",
"12800",
"30433",
"71936",
"170528",
"405140",
"960039",
"2259412",
"5272302",
"12207404",
"28100505",
"64437020",
"147387480",
"336449420",
"766499736",
"1742452890",
"3952091015",
"8944258380",
"20202499027",
"4555324... | [
"nonn",
"easy",
"new"
] | 13 | 0 | 2 | [
"A368475",
"A392589"
] | null | Seiichi Manyama, Jan 17 2026 | 2026-01-17T10:45:31 | oeisdata/seq/A392/A392589.seq | 6fa2c354bd2bcb87b192ee5037466453 |
A392590 | Upper irredundance and domination number of the n-Moebius ladder. | [
"1",
"1",
"3",
"4",
"5",
"5",
"7",
"8",
"9",
"9",
"11",
"12",
"13",
"13",
"15",
"16",
"17",
"17",
"19",
"20",
"21",
"21",
"23",
"24",
"25",
"25",
"27",
"28",
"29",
"29",
"31",
"32",
"33",
"33",
"35",
"36",
"37",
"37",
"39",
"40",
"41",
... | [
"nonn",
"easy",
"new"
] | 6 | 1 | 3 | null | null | Eric W. Weisstein, Jan 17 2026 | 2026-01-17T11:03:04 | oeisdata/seq/A392/A392590.seq | 3f52edcf38fedc3fadf154abb3ec8a22 |
A392592 | Intersection of A391845 and A391866. | [
"150",
"294",
"578",
"1050",
"1650",
"1694",
"1950",
"2535",
"2550",
"2850",
"3234",
"3450",
"3630",
"3822",
"4350",
"4650",
"4998",
"5550",
"5586",
"6150",
"6450",
"6762",
"7050",
"7942",
"7950",
"8526",
"8850",
"8918",
"9114",
"9150",
"9295",
"10050",
... | [
"nonn",
"new"
] | 11 | 1 | 1 | [
"A003415",
"A003557",
"A008966",
"A020639",
"A053669",
"A276085",
"A359550",
"A369650",
"A371083",
"A391844",
"A391866",
"A392592"
] | null | Antti Karttunen, Jan 17 2026 | 2026-01-17T10:45:24 | oeisdata/seq/A392/A392592.seq | d7bdac9fb62b2a50e2f7ce9b7887526b |
A392593 | Numbers k such that A003415(k) == A276085(k) (mod 3), where A003415 is the arithmetic derivative and A276085 is the primorial base log-function. | [
"1",
"2",
"8",
"10",
"12",
"15",
"22",
"24",
"27",
"28",
"32",
"33",
"34",
"35",
"36",
"46",
"51",
"52",
"58",
"64",
"65",
"69",
"76",
"77",
"82",
"84",
"87",
"94",
"95",
"100",
"105",
"106",
"118",
"119",
"123",
"124",
"125",
"128",
"135",... | [
"nonn",
"new"
] | 9 | 1 | 2 | [
"A003415",
"A276085",
"A369650",
"A373144",
"A373153",
"A373253",
"A391864",
"A392593"
] | null | Antti Karttunen, Jan 17 2026 | 2026-01-17T10:45:27 | oeisdata/seq/A392/A392593.seq | e3565da39b29a3a508ec768e404e7413 |
A392596 | a(n) = A276086(n) mod 360, where A276086 is the primorial base exp-function. | [
"1",
"2",
"3",
"6",
"9",
"18",
"5",
"10",
"15",
"30",
"45",
"90",
"25",
"50",
"75",
"150",
"225",
"90",
"125",
"250",
"15",
"30",
"45",
"90",
"265",
"170",
"75",
"150",
"225",
"90",
"7",
"14",
"21",
"42",
"63",
"126",
"35",
"70",
"105",
"... | [
"nonn",
"base",
"new"
] | 9 | 0 | 2 | [
"A047247",
"A047257",
"A276086",
"A353486",
"A358840",
"A358850",
"A372576",
"A380486",
"A392596"
] | null | Antti Karttunen, Jan 18 2026 | 2026-01-18T21:47:19 | oeisdata/seq/A392/A392596.seq | 9905d1a66189d73f048810147dcbbaa6 |
A392597 | The largest 7-smooth divisor of n. | [
"1",
"2",
"3",
"4",
"5",
"6",
"7",
"8",
"9",
"10",
"1",
"12",
"1",
"14",
"15",
"16",
"1",
"18",
"1",
"20",
"21",
"2",
"1",
"24",
"25",
"2",
"27",
"28",
"1",
"30",
"1",
"32",
"3",
"2",
"35",
"36",
"1",
"2",
"3",
"40",
"1",
"42",
"1",... | [
"nonn",
"mult",
"easy",
"new"
] | 17 | 1 | 2 | [
"A002473",
"A006519",
"A007814",
"A007949",
"A038500",
"A060904",
"A065331",
"A112765",
"A214411",
"A268354",
"A355582",
"A392597",
"A392598"
] | null | Antti Karttunen, Jan 18 2026 | 2026-01-18T15:41:14 | oeisdata/seq/A392/A392597.seq | 493fac11e281c9a2a079e2da58ecc387 |
A392598 | The largest 11-smooth divisor of n. | [
"1",
"2",
"3",
"4",
"5",
"6",
"7",
"8",
"9",
"10",
"11",
"12",
"1",
"14",
"15",
"16",
"1",
"18",
"1",
"20",
"21",
"22",
"1",
"24",
"25",
"2",
"27",
"28",
"1",
"30",
"1",
"32",
"33",
"2",
"35",
"36",
"1",
"2",
"3",
"40",
"1",
"42",
"... | [
"nonn",
"mult",
"easy",
"new"
] | 16 | 1 | 2 | [
"A006519",
"A051038",
"A065331",
"A355582",
"A391946",
"A392597",
"A392598"
] | null | Antti Karttunen, Jan 18 2026 | 2026-01-18T15:41:19 | oeisdata/seq/A392/A392598.seq | 8e1b02d6b79ab9f9c941860c5679fc15 |
A392619 | a(n) = denominator((2^n*(n!)^2/(1+2*n)!)^2). | [
"1",
"9",
"225",
"1225",
"99225",
"480249",
"9018009",
"41409225",
"11967266025",
"53335593025",
"940839860961",
"4113258565689",
"285642955950625",
"1232152159100625",
"21147754404155625",
"90324408810638025",
"98363281194784809225",
"416937783611112080625",
"7046763281032252325... | [
"nonn",
"frac",
"new"
] | 4 | 0 | 2 | [
"A000079",
"A000142",
"A001044",
"A002697",
"A009445",
"A124399",
"A134374",
"A392619"
] | null | Stefano Spezia, Jan 17 2026 | 2026-01-18T14:01:21 | oeisdata/seq/A392/A392619.seq | 588357933ad29113a89853a281002cc8 |
A392631 | Numbers whose exponential divisors are all numbers whose number of divisors is a power of 2. | [
"1",
"2",
"3",
"5",
"6",
"7",
"8",
"10",
"11",
"13",
"14",
"15",
"17",
"19",
"21",
"22",
"23",
"24",
"26",
"27",
"29",
"30",
"31",
"33",
"34",
"35",
"37",
"38",
"39",
"40",
"41",
"42",
"43",
"46",
"47",
"51",
"53",
"54",
"55",
"56",
"57... | [
"nonn",
"easy",
"new"
] | 6 | 1 | 2 | [
"A000668",
"A036537",
"A049419",
"A322791",
"A336591",
"A392630",
"A392631",
"A392632"
] | null | Amiram Eldar, Jan 18 2026 | 2026-01-18T15:32:06 | oeisdata/seq/A392/A392631.seq | 5324d82fbaa9441cb811d6d766859303 |
A392638 | Expansion of 1 / ((1-x)^4 - x^5)^2. | [
"1",
"8",
"36",
"120",
"330",
"794",
"1740",
"3588",
"7163",
"14170",
"28187",
"56624",
"114444",
"231132",
"463828",
"922492",
"1818893",
"3562732",
"6950090",
"13530532",
"26316651",
"51146830",
"99293420",
"192450160",
"372275805",
"718674492",
"1384826061",
... | [
"nonn",
"easy",
"new"
] | 13 | 0 | 2 | [
"A390044",
"A392579",
"A392582",
"A392585",
"A392588",
"A392638"
] | null | Seiichi Manyama, Jan 18 2026 | 2026-01-18T14:11:03 | oeisdata/seq/A392/A392638.seq | 514765229cf7feef436aea5fefe7c53a |
A392639 | Expansion of 1 / ((1-x)^5 - x^5)^2. | [
"1",
"10",
"55",
"220",
"715",
"2004",
"5035",
"11680",
"25670",
"54740",
"115637",
"245540",
"527120",
"1141580",
"2478135",
"5357532",
"11489175",
"24414650",
"51475350",
"107942700",
"225697580",
"471409650",
"984407325",
"2055138800",
"4287086100",
"8930208942",... | [
"nonn",
"easy",
"new"
] | 13 | 0 | 2 | [
"A049016",
"A392580",
"A392583",
"A392586",
"A392589",
"A392639"
] | null | Seiichi Manyama, Jan 18 2026 | 2026-01-18T14:10:59 | oeisdata/seq/A392/A392639.seq | 1a55f7c743eb41cb6b2f2ae471517bcb |
A392640 | Expansion of 1 / sqrt((1-x)^4 - 4*x^3). | [
"1",
"2",
"3",
"6",
"17",
"48",
"125",
"320",
"843",
"2274",
"6165",
"16698",
"45317",
"123520",
"337941",
"926804",
"2546315",
"7007970",
"19320269",
"53345662",
"147489843",
"408261820",
"1131321795",
"3138104148",
"8712572219",
"24209742230",
"67324021713",
"... | [
"nonn",
"new"
] | 13 | 0 | 2 | [
"A098479",
"A101500",
"A162480",
"A392640",
"A392643"
] | null | Seiichi Manyama, Jan 18 2026 | 2026-01-18T14:10:43 | oeisdata/seq/A392/A392640.seq | d3a1a3676d22f4b5b955ea967d8573eb |
A392641 | Expansion of 1 / sqrt((1-x)^6 - 4*x). | [
"1",
"5",
"30",
"210",
"1555",
"11853",
"92082",
"724950",
"5763795",
"46172855",
"372102306",
"3013333458",
"24500724241",
"199885491275",
"1635455540700",
"13414669956880",
"110272326857385",
"908207029425765",
"7492741133150170",
"61909184062082850",
"512225173969783845",
... | [
"nonn",
"new"
] | 7 | 0 | 2 | [
"A001850",
"A162480",
"A392641"
] | null | Seiichi Manyama, Jan 18 2026 | 2026-01-18T14:10:51 | oeisdata/seq/A392/A392641.seq | 92cfe3ee1bf1756a1cfe39bfabf3ad8c |
A392642 | Expansion of 1 / sqrt((1-x)^6 - 4*x^2). | [
"1",
"3",
"8",
"28",
"111",
"441",
"1758",
"7110",
"29101",
"120003",
"497598",
"2073074",
"8671473",
"36394155",
"153183348",
"646345300",
"2733100395",
"11579042025",
"49138564920",
"208846332468",
"888831570633",
"3787421110239",
"16156612556814",
"68991749120934",
... | [
"nonn",
"new"
] | 7 | 0 | 2 | [
"A002426",
"A101500",
"A392642"
] | null | Seiichi Manyama, Jan 18 2026 | 2026-01-18T14:10:47 | oeisdata/seq/A392/A392642.seq | 68a9be5d83eeb3fa322ff79457563089 |
A392643 | Expansion of 1 / sqrt((1-x)^6 - 4*x^3). | [
"1",
"3",
"6",
"12",
"33",
"111",
"364",
"1116",
"3339",
"10161",
"31716",
"100206",
"316761",
"999711",
"3158964",
"10015848",
"31861935",
"101581353",
"324310822",
"1036644708",
"3317810325",
"10632401247",
"34112959080",
"109559248392",
"352184126953",
"113305463... | [
"nonn",
"new"
] | 7 | 0 | 2 | [
"A098479",
"A392640",
"A392643"
] | null | Seiichi Manyama, Jan 18 2026 | 2026-01-18T14:10:55 | oeisdata/seq/A392/A392643.seq | 275cd7ea4ac4e354460db9f10c974c60 |
A392644 | Expansion of 1 / ((1-x)^6 - 9*x)^(1/3). | [
"1",
"5",
"45",
"490",
"5720",
"69477",
"865798",
"10983770",
"141191010",
"1833394015",
"23998524098",
"316182713994",
"4188231151213",
"55730336729180",
"744444532476735",
"9977530765306354",
"134115304302092618",
"1807365910946533092",
"24411819111522215806",
"33039590208021... | [
"nonn",
"new"
] | 10 | 0 | 2 | [
"A376802",
"A392644",
"A392645"
] | null | Seiichi Manyama, Jan 18 2026 | 2026-01-18T15:40:53 | oeisdata/seq/A392/A392644.seq | c40edd7b241d17b4e438ed85979743bf |
A392645 | Expansion of 1 / ((1-x)^9 - 9*x)^(1/3). | [
"1",
"6",
"60",
"748",
"9990",
"138810",
"1979236",
"28732764",
"422671941",
"6281155171",
"94095173304",
"1418823943800",
"21509727359176",
"327577920781440",
"5008154876335128",
"76823470787130208",
"1181889973307518314",
"18229495033286520264",
"281812455269997428098",
"4365... | [
"nonn",
"new"
] | 8 | 0 | 2 | [
"A376802",
"A392644",
"A392645"
] | null | Seiichi Manyama, Jan 18 2026 | 2026-01-18T14:09:41 | oeisdata/seq/A392/A392645.seq | 43be3daf7e82a48ddaad79c8bbca54fe |
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