id
stringlengths
7
11
seq
listlengths
1
347
keywords
listlengths
1
8
A181959
[ 9, 48, 236, 1274, 6489, 30229, 142320, 711955, 3601566 ]
[ "nonn" ]
A111207
[ 4, 10, 25, 46, 55, 106, 123, 145, 159, 205, 226, 267, 339, 358, 415, 466, 529, 573, 583, 718, 753, 843, 865, 979, 1077, 1195, 1243, 1257, 1293, 1366, 1405, 1465, 1473, 1486, 2098, 2157, 2206, 2427, 2455, 2545, 2563, 2581, 2599, 26...
[ "nonn" ]
A260769
[ 1, 3, 15, 84, 491, 2948, 18018, 111520, 696739, 4384668, 27753110, 176494640, 1126809230, 7217773800, 46364184420, 298554038144, 1926593569059, 12455864623020, 80664529969422, 523165672201744, 3397648036150426, 22092460470618330, 143809661629562460 ]
[ "nonn" ]
A071685
[ 1089, 2178, 8712, 9801, 10989, 21978, 87912, 98901, 109989, 219978, 879912, 989901, 1099989, 2199978, 8799912, 9899901, 10891089, 10999989, 21782178, 21999978, 87128712, 87999912, 98019801, 98999901, 108901089, 109999989 ]
[ "base", "easy", "nonn" ]
A277079
[ 1, 35, 7, 61, 5, 6, 3, 7, 5, 10, 11, 15, 6, 36, 7, 16, 17, 33, 16, 44, 6, 48, 36, 3, 5, 9, 31, 8, 32, 69, 8, 5, 8, 5, 2, 2, 9, 8, 6, 6, 5, 8, 7, 6, 6, 9, 8, 6, 2, 7, 2, 8, 6, 5, 5, 5, 3, 8, 9, 6, ...
[ "nonn", "base", "easy" ]
A286983
[ 1, 2, 4, 9, 20, 48, 117, 294, 748, 1925, 4984, 12960, 33785, 88218, 230580, 603057, 1577836, 4129232, 10807885, 28291230, 74060636, 193882317, 507572784, 1328814144, 3478834225, 9107631218, 23843966692, 62424118809, 163428146948, 427859929200, 112015100502...
[ "easy", "nonn" ]
A208313
[ 64, 1458, 26772, 459810, 7702668, 127750122, 2110085532, 34794255294, 573347277990, 9445146465474, 155579502783600, 2562580517033736, 42208064346447490, 695201252701136800, 11450503035670909000 ]
[ "nonn" ]
A046858
[ 1, 1, 1, 1, 2, 4, 2, 1, 1, 2, 8, 17, 24, 24, 17, 8, 2, 1, 1, 2, 9, 32, 95, 203, 373, 515, 584, 515, 373, 203, 95, 32, 9, 2, 1, 1, 2, 9, 36, 157, 549, 1692, 4374, 9626, 17874, 28373, 38486, 44805, 44805, 38486, 28373,...
[ "nonn", "tabf", "nice" ]
A204462
[ 1, 6, 318, 32134, 4083008, 587267282, 91403537276, 15027205920330, 2572042542065646, 454018964549333300, 82122490665668030000, 1.5150820045467016e+22, 2.841258381788565e+24, 5.402010852845358e+26, 1.0391781837999351e+29 ]
[ "nonn" ]
A102384
[ 1, 2, 2, 2, 61, 23, 2, 821, 2, 5, 4201, 2, 2, 2, 137, 7, 2, 270131, 2, 5, 13, 2, 2, 2, 61277761, 17, 2, 7, 2, 5, 3373, 2, 2, 2, 113647, 53, 2, 274359834731, 2, 5, 109, 2, 2, 2, 19, 23888027348153, 7, 34613, 2, 5, 7, ...
[ "nonn", "base" ]
A298990
[ 1, 2, 4, 5, 8, 11, 12, 17, 18, 37, 24, 53, 30, 89, 39, 71, 42, 101, 45, 179, 57, 137, 72, 193, 60, 233, 84, 257, 90, 251, 117, 401, 123, 311, 144, 373, 120, 347, 105, 457, 162, 661, 150, 479, 180, 547, 237, 599, 165, 6...
[ "nonn" ]
A349324
[ 15697403475, 62789613900, 141276631275, 251158455600, 392435086875, 565106525100, 769172770275, 1004633822400, 1271489681475, 1569740347500, 1899385820475, 2260426100400, 2652861187275, 3076691081100, 3531915781875, 4018535289600, 4536549604275, 5085958725900 ]
[ "nonn" ]
A220003
[ 4, 7, 109, 4474, 381745, 83856137 ]
[ "nonn" ]
A344611
[ 1, 2, 4, 8, 15, 27, 48, 81, 135, 220, 352, 553, 859, 1313, 1986, 2969, 4394, 6439, 9357, 13479, 19273, 27353, 38558, 53998, 75168, 104022, 143172, 196021, 267051, 362086, 488733, 656802, 879026, 1171747, 1555997, 2058663, 2714133, 3566122, ...
[ "nonn" ]
A006951
[ 1, 1, 3, 6, 14, 27, 60, 117, 246, 490, 1002, 1998, 4053, 8088, 16284, 32559, 65330, 130626, 261726, 523374, 1047690, 2095314, 4192479, 8384808, 16773552, 33546736, 67101273, 134202258, 268420086, 536839446, 1073710914, 2147420250, 4294904430, 8589807...
[ "nonn" ]
A214657
[ 0, 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 43, 45, 47, 49, 51, 53, 55, 57, 59, 61, 63, 65, 66, 68, 70, 72, 74, 76, 78, 80, 82, 84, 86, 87, 89, 91, 93, 95, 97, 99, 101,...
[ "nonn" ]
A263660
[ 1, 2, 4, 7, 8, 12, 16, 24, 32, 48, 64, 96, 128, 192, 256, 384, 512, 768, 1024, 1536, 2048, 3072, 4096, 6144, 8192, 12288, 16384, 24576, 32768, 49152, 65536, 98304, 131072, 196608, 262144, 393216, 524288, 786432, 1048576, 1572864, 209715...
[ "nonn" ]
A200358
[ 1, 3, 6, 1, 4, 6, 7, 2, 4, 9, 5, 0, 1, 4, 4, 4, 1, 9, 9, 9, 3, 0, 0, 0, 6, 1, 9, 6, 1, 1, 0, 2, 7, 3, 6, 2, 6, 7, 7, 8, 0, 5, 2, 7, 5, 9, 7, 8, 6, 3, 1, 1, 0, 8, 0, 5, 8, 1, 0, 9, 7, 6, 1, 3...
[ "nonn", "cons" ]
A054695
[ 113, 199, 773, 7043, 13477, 13477, 13477, 13477, 13477, 115153, 202409, 303731, 303731, 406817, 406817, 406817, 913639, 913639, 970447, 970447, 4338709, 4338709, 8798329, 8798329, 15022619, 15022619, 27645511, 41858209, 41858209, 41858209, 54892769 ]
[ "nonn" ]
A003817
[ 0, 1, 3, 3, 7, 7, 7, 7, 15, 15, 15, 15, 15, 15, 15, 15, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, ...
[ "nonn", "base", "nice" ]
A186292
[ 1, 2, -30, 1008, -50760, 3227400, -232071840, 17196863040, -1246907208960, 104187854836800, -13090506064574400, 191142937964563200, 646777849055450100000, 3.3999557199310424e+23, -2.271224630581266e+26, -3.616112076850469e+29, 1.1041014990301517e+32 ]
[ "sign" ]
A336019
[ 7, 7, 11, 9, 7, 17, 7, 7, 11, 9, 7, 17, 7, 7, 11, 9, 7, 17, 7, 7, 11, 9, 7, 17, 7, 7, 11, 9, 7, 17, 7, 7, 11, 9, 7, 23, 7, 7, 11, 9, 7, 17, 7, 7, 11, 9, 7, 23, 7, 7, 11, 9, 7, 17, 7, 7, 11, 9, 7, 17...
[ "easy", "nonn", "base" ]
A328452
[ 1627, 3089, 4297, 4831, 6481, 6793, 8543, 11027, 11867, 13421, 13649, 14177, 17509, 17807, 18839, 18859, 20359, 20411, 22501, 22511, 22963, 22973, 24923, 25189, 26449, 26459, 27367, 27541, 28309, 29443, 29453, 31081, 32203, 32381, 34919, 35171, ...
[ "nonn", "base" ]
A172370
[ 3, 5, 8, 7, 3, 15, 9, 16, 21, 24, 11, 5, 1, 2, 35, 13, 24, 33, 40, 45, 48, 15, 7, 39, 3, 55, 15, 63, 17, 32, 5, 56, 65, 8, 77, 80, 19, 9, 51, 4, 3, 21, 91, 6, 99, 21, 40, 57, 72, 85, 96, 105, 112, 117, 120, ...
[ "nonn", "easy", "tabl" ]
A030420
[ 1, 2, 4, 1, 2, 1, 1, 3, 1, 1, 1, 1, 1, 1, 1, 5, 1, 1, 1, 2, 1, 1, 2, 1, 2, 1, 2, 1, 1, 1, 1, 1, 2, 1, 1, 2, 2, 1, 1, 1, 1, 2, 2, 1, 3, 1, 1, 1, 1, 1, 2, 1, 1, 1, 3, 1, 1, 2, 1, 1, 2, 1, 1, 2...
[ "nonn", "base" ]
A158607
[ 9, 11, 13, 5, 7, 9, 11, 13, 5, 7, 9, 11, 13, 5, 7, 9, 11, 13, 5, 7, 9, 11, 13, 5, 7, 9, 11, 13, 5, 7, 9, 11, 13, 5, 7, 9, 11, 13, 5, 7, 9, 11, 13, 5, 7, 9, 11, 13, 5, 7, 9, 11, 13, 5, 7, 9, 11, 13, 5,...
[ "nonn", "easy" ]
A029831
[ 236364091, 131040, 1099243323360, 12336522153621120, 9221121336284414000, 1.5621185302734375e+21, 1.0348626076656551e+23, 3.5864006514442035e+24, 7.7352372210526125e+25, 1.1613994112116003e+27 ]
[ "nonn", "easy" ]
A366229
[ 1, 1, 2, 4, 10, 23, 55, 138, 349, 904, 2377, 6323, 16993, 46036, 125625, 344973, 952565, 2643257, 7366942, 20613366, 57884187, 163071852, 460769168, 1305466309, 3707928596, 10555941648, 30115379589, 86087330322, 246541672062, 707274898726, 2032285666846 ]
[ "nonn" ]
A232238
[ 3, 5, 17, 71, 269, 1049, 1151, 1721, 5099, 5279, 5657, 6299, 6569, 6779, 7307, 7589, 16451, 16649, 16691, 19079, 19139, 19211, 19841, 19961, 20771, 20981, 21011, 21059, 21599, 22619, 22961, 23201, 23369, 23741, 23909, 24419, 26729, 26951, 2...
[ "nonn", "base", "less" ]
A270769
[ 52, 307, 1845, 11437, 73561, 492112, 3426532, 24825947, 187018111, 1463322425, 11878759787, 99919924444, 869876263976, 7828394233551, 72744595145117, 697213288063149, 6885160707939613, 69986707107451700, 731580664064312700, 7857203170378852000 ]
[ "nonn" ]
A165756
[ 1, 4, 12, 36, 108, 324, 972, 2916, 8748, 26244, 78726, 236160, 708432, 2125152, 6375024, 19123776, 57367440, 172090656, 516236976, 1548605952, 4645502958, 13935564252, 41803859076, 125403076764, 376183730628, 1128474698076 ]
[ "nonn" ]
A070269
[ 2, 409, 439, 3631, 4441, 4657, 8681, 12841, 15889, 16633, 21559, 22751, 28393, 30091, 30937, 32257, 32353, 33811, 33871, 36793, 36871, 41809, 41851, 42193, 46649, 48673, 51631, 55921, 58237, 59053, 59497, 60889, 63691, 64609, 71011 ]
[ "easy", "nonn" ]
A141046
[ 0, 4, 64, 324, 1024, 2500, 5184, 9604, 16384, 26244, 40000, 58564, 82944, 114244, 153664, 202500, 262144, 334084, 419904, 521284, 640000, 777924, 937024, 1119364, 1327104, 1562500, 1827904, 2125764, 2458624, 2829124, 3240000, 3694084, 4194304, 474368...
[ "easy", "nonn" ]
A238905
[ 6, 15, 22, 33, 39, 57, 69, 111, 129, 141, 183, 201, 214, 219, 237, 309, 453, 471, 489, 573, 579, 633, 669, 813, 831, 849, 939, 993, 1101, 1149, 1191, 1263, 1371, 1389, 1461, 1519, 1569, 1623, 1641, 1821, 1839, 1893, 1942, 1983, ...
[ "nonn", "easy" ]
A182642
[ 2, 4, 11, 17, 46, 76, 199, 321, 842, 1364, 3571, 5777, 15126, 24476, 64079, 103681, 271442, 439204, 1149851, 1860497, 4870846, 7881196, 20633239, 33385282, 87403803, 141422324, 370248451, 599074578 ]
[ "nonn" ]
A124108
[ 0, 2, 4, 10, 8, 18, 20, 42, 16, 34, 36, 74, 40, 82, 84, 170, 32, 66, 68, 138, 72, 146, 148, 298, 80, 162, 164, 330, 168, 338, 340, 682, 64, 130, 132, 266, 136, 274, 276, 554, 144, 290, 292, 586, 296, 594, 596, 1194, 160,...
[ "nonn" ]
A166523
[ 1, 15, 9, 23, 17, 31, 25, 39, 33, 47, 41, 55, 49, 63, 57, 71, 65, 79, 73, 87, 81, 95, 89, 103, 97, 111, 105, 119, 113, 127, 121, 135, 129, 143, 137, 151, 145, 159, 153, 167, 161, 175, 169, 183, 177, 191, 185, 199, 193, ...
[ "nonn", "easy" ]
A297056
[ 0, 41, 559647, 2058903341490, 1.919822469194025e+21, 4.547935833875142e+32, 2.73689740257248e+46, 4.184031666606898e+62 ]
[ "nonn" ]
A087299
[ 1, 1, 4, 6, 32, 60, 384, 840, 6144, 15120, 122880, 332640, 2949120, 8648640, 82575360, 259459200, 2642411520, 8821612800, 95126814720, 335221286400, 3805072588800, 14079294028800, 167423193907200, 647647525324800 ]
[ "nonn", "easy" ]
A010233
[ 13, 1, 4, 1, 1, 3, 2, 2, 13, 2, 2, 3, 1, 1, 4, 1, 26, 1, 4, 1, 1, 3, 2, 2, 13, 2, 2, 3, 1, 1, 4, 1, 26, 1, 4, 1, 1, 3, 2, 2, 13, 2, 2, 3, 1, 1, 4, 1, 26, 1, 4, 1, 1, 3, 2, 2, 13, 2, 2, 3, 1, 1, ...
[ "nonn", "cofr" ]
A235847
[ 1716484, 835207356, 415698469568, 209981690279512, 106515130271657920, 54136683763799150000, 2.7532688852050445e+22, 1.4006328394338213e+25, 7.12592442949103e+27, 3.625560220486995e+30 ]
[ "nonn" ]
A172444
[ 0, 0, 1, 0, 0, 0, 2, 0, 2, 0, 2, 0, 1, 0, 1, 0, 3, 0, 2, 0, 2, 0, 1, 0, 0, 0, 0, 0, 1 ]
[ "nonn", "fini", "full" ]
A251741
[ 0, 0, 0, 0, 1, 0, 0, 0, 1, 2, 4, 8, 16, 31, 62, 124, 248, 495, 988, 1972, 3936, 7856, 15681, 31300, 62476, 124704, 248913, 496838, 991704, 1979472, 3951088, 7886495, 15741690, 31420904, 62717104, 125185295, 249873752, 498755800, 995532128, ...
[ "nonn", "easy" ]
A219075
[ 17, 625, 17537, 494713, 14228041, 407374825, 11660290321, 333882416305, 9559854123673, 273717397488937, 7837125931615553, 224393896465841060, 6424880595963478000, 183958193843792120000, 5.26712003090366e+21 ]
[ "nonn" ]
A363487
[ 0, 1, 2, 1, 3, 2, 4, 1, 2, 3, 5, 1, 6, 4, 3, 1, 7, 2, 8, 1, 4, 5, 9, 1, 3, 6, 2, 1, 10, 3, 11, 1, 5, 7, 4, 2, 12, 8, 6, 1, 13, 4, 14, 1, 2, 9, 15, 1, 4, 3, 7, 1, 16, 2, 5, 1, 8, 10, 17, 1, 18, 1...
[ "nonn" ]
A054122
[ 1, 3, 18, 114, 750, 5058, 34692, 240852, 1687446, 11906610, 84490428, 602335836, 4310670156, 30950436468, 222844189320, 1608369633384, 11632913018598, 84294762019218, 611831430746124, 4447397950230540 ]
[ "nonn" ]
A139716
[ 0, 1, 2, 0, 4, 2, 6, 4, 0, 6, 10, 3, 12, 10, 6, 0, 16, 9, 18, 4, 12, 18, 22, 8, 0, 22, 18, 12, 28, 5, 30, 16, 24, 30, 10, 0, 36, 34, 30, 15, 40, 6, 42, 28, 20, 42, 46, 12, 0, 25, 42, 36, 52, 18, 30, 7, 48...
[ "nonn" ]
A165336
[ 4, 13, 16, 22, 25, 28, 31, 40, 46, 49, 52, 55, 61, 64, 79, 82, 94, 97, 103, 106, 115, 127, 130, 133, 136, 151, 160, 163, 172, 199, 202, 205, 208, 217, 220, 229, 235, 238, 244, 250, 253, 256, 265, 271, 280, 283, 289, 292, ...
[ "base", "nonn" ]
A109861
[ 25, 49, 121, 143, 169, 187, 209, 221, 247, 289, 299, 323, 361, 391, 437, 493, 527, 529, 551, 589, 629, 667, 703, 713, 779, 817, 841, 851, 899, 943, 961, 989, 1073, 1081, 1147, 1189, 1219, 1247, 1271, 1333, 1363, 1369, 1457, 1517, ...
[ "nonn" ]
A245252
[ 2, 29, 661, 4289, 24247, 2088221, 4446863 ]
[ "nonn", "more", "base" ]
A113446
[ 1, 1, -1, 1, 2, -1, 0, 1, 1, 2, 0, -1, 2, 0, -2, 1, 2, 1, 0, 2, 0, 0, 0, -1, 3, 2, -1, 0, 2, -2, 0, 1, 0, 2, 0, 1, 2, 0, -2, 2, 2, 0, 0, 0, 2, 0, 0, -1, 1, 3, -2, 2, 2, -1, 0, 0, 0, 2, 0, -2, 2, ...
[ "sign", "easy", "mult" ]
A366640
[ 5, 79, 1831, 1856917, 517136788981, 2.5309896984298198e+22, 9.737146484866113e+42 ]
[ "nonn" ]
A149952
[ 1, 2, 5, 15, 50, 180, 672, 2604, 10323, 41831, 172429, 720543, 3049052, 13030183, 56185637, 244129491, 1067890597, 4699223135, 20788315074, 92400789578, 412460510507, 1848288462615, 8311490226015, 37495508818308, 169649803369283, 769655804205711, 3500411708041304,...
[ "nonn", "walk" ]
A037050
[ 1, 121, 187, 14014 ]
[ "nonn", "base", "hard", "more" ]
A388796
[ 1, 5, 9, 3, 9, 5, 7, 2, 3, 7, 2, 3, 5, 6, 2, 7, 8, 1, 5, 2, 8, 1, 9, 7, 2, 3, 2, 4, 7, 5, 6, 6, 3, 7, 2, 7, 3, 0, 1, 8, 6, 8, 5, 2, 6, 0, 3, 1, 4, 4, 2, 2, 2, 0, 1, 7, 5, 9, 9, 2, 4, 6, 6, 9...
[ "nonn", "cons" ]
A176009
[ 11, 211, 1123, 1423, 112543, 1124653, 1234657, 112345687, 1123468597, 10123457689 ]
[ "base", "fini", "full", "nonn" ]
A123374
[ 2, 5, 17, 151 ]
[ "hard", "more", "nonn" ]
A388467
[ 1, 9, 1, 4, 9, 0, 7, 9, 4, 0, 9, 8, 4, 9, 3, 2, 7, 1, 1, 1, 9, 8, 3, 4, 7, 5, 2, 5, 5, 9, 3, 8, 9, 3, 4, 5, 2, 2, 1, 1, 5, 4, 9, 1, 1, 7, 1, 9, 3, 7, 9, 5, 2, 4, 5, 9, 9, 6, 4, 5, 6, 0, 4, 6...
[ "nonn", "cons" ]
A266600
[ 1, 2, 6, 20, 83, 410, 2109, 11097, 59698, 325240, 1786820, 9888567, 55061514, 308166631, 1732444205, 9777801332, 55377818912, 314616215640, 1792424007975, 10237590562396, 58607205582421, 336211631539125, 1932440491804486 ]
[ "nonn" ]
A060536
[ 1, 15, 45, 90, 495, 1866, 5990, 19920, 62655, 186525, 526470, 1403265, 3530000, 8388495, 18884475, 40442635, 82775970, 162663240, 308201500, 565176105, 1006419120, 1745321275, 2955037455, 4895398755, 7950135835, 12677752431 ]
[ "easy", "nonn" ]
A238102
[ 39, 367, 1107, 8247, 19463, 97243 ]
[ "nonn", "more" ]
A386132
[ 5, 7, 11, 17, 71, 151, 157, 181, 557, 571, 577, 587, 751, 757, 787, 811, 857, 877, 881, 887, 1117, 1151, 1171, 1181, 1187, 1511, 1571, 1777, 1787, 1811, 1871, 1877, 5171, 5557, 5581, 5711, 5717, 5851, 5857, 5881, 7151, 7177, 7187, ...
[ "nonn", "base", "easy" ]
A191674
[ 1, 2, 2, 4, 6, 2, 4, 8, 14, 6, 14, 5, 14, 5, 7, 16, 30, 14, 30, 12, 24, 14, 30, 11, 30, 14, 18, 11, 30, 9, 12, 32, 62, 30, 62, 28, 62, 30, 62, 24, 62, 24, 62, 28, 43, 30, 45, 23, 62, 30, 41, 28, 62, 21, 41, ...
[ "nonn", "base" ]
A145275
[ 15005, 792070839820228500000, 3.117598077621748e+104 ]
[ "nonn" ]
A093099
[ 11, 12, 23, 35, 58, 813, 139, 394, 9412, 41213, 12135, 21353, 13533, 35334, 53348, 33488, 34886, 48867, 886712, 8671216, 67121614, 712161413, 121614138, 216141383, 161413833, 614138337, 141383377, 413833775, 138337755, 383377554, 8337755411, 33775541111 ...
[ "nonn", "base" ]
A300895
[ 1, 1, 4, -3, 6, -2, 1, 5, 4, -4, 1, -6, 14, 1, 9, -11, 1, -2, 1, -8, 25, 1, 1, 2, 6, -12, 4, -3, 1, -7, 1, -11, 4, 35, 6, -6, 1, 1, 17, 0, 1, -23, 1, -3, 9, 1, 1, -14, 1, -4, 4, -16, 1, -2, 61, 5, 4, 1,...
[ "sign" ]
A051458
[ 4, 7, 13, 20, 10, 45, 13, 50, 112, 161, 63, 162, 273, 16, 225, 435, 588, 660, 1023, 19, 111, 396, 1683, 2178, 130, 507, 3861, 22, 637, 4004, 8151, 25, 196, 960, 3290, 8372, 16380, 25168, 30745, 221, 1156, 4250, 11662, 24752, 415...
[ "nonn" ]
A135738
[ 3, 6, 10, 10, 54, 54, 54, 54, 130, 130, 130, 130, 390, 390, 2000, 2000, 3238, 3238, 4080, 4080, 7326, 7326, 16584, 16584, 17310, 17310, 17310, 17310, 17310, 17310, 17310, 17310, 231000, 231000, 231000, 231000, 466352, 466352, 466352, 4663...
[ "nonn", "base" ]
A374861
[ 0, 1, 12, 144, 2400, 50400, 1143072, 31046400, 903260160, 30356726400, 1154305152000, 46189964620800, 2053748448460800, 100323076215398400, 5103635783178240000, 282151131740577800000, 1.6183501766885376e+22, 9.999426827598849e+23 ]
[ "nonn" ]
A077020
[ 1, 1, 1, 3, 1, 5, 7, 3, 17, 11, 23, 45, 1, 91, 89, 93, 271, 85, 457, 627, 287, 1541, 967, 2115, 4049, 181, 8279, 7917, 8641, 24475, 7193, 41757, 56143, 27371, 139657, 84915, 194399, 364229, 24569, 753027, 703889, 802165, 2209943, ...
[ "nonn" ]
A029508
[ 1, 3, 5, 7, 32, 77, 93, 96, 160, 224, 352, 889, 941, 2275, 3421, 10368, 23744, 31104, 40832, 168111, 303296, 3496928, 6149591, 8275552, 8333395, 9774432 ]
[ "nonn", "base", "more" ]
A200042
[ 2, 168, 1450, 7384, 25814, 72220, 169170, 351964, 667998, 1174860, 1958474, 3119900, 4772250, 7066336, 10146330, 14251004, 19583286, 26418704, 35030826, 45705392, 58910542, 75014652, 94447002, 117742012, 145274026, 177897944 ]
[ "nonn" ]
A223842
[ 7, 49, 232, 824, 2388, 5992, 13582, 28642, 57306, 110164, 205131, 371923, 658926, 1143584, 1947904, 3261320, 5374024, 8725020, 13970658, 22081342, 34476575, 53211615, 81232894, 122724138, 183570978, 271978936, 399288201, 581038793, 838351784, 1199706462, 1...
[ "nonn" ]
A026467
[ 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 15, 16, 17, 18, 19, 21, 22, 23, 24, 26, 27, 28, 30, 31, 32, 33, 35, 36, 37, 38, 39, 42, 43, 44, 46, 47, 48, 49, 50, 51, 54, 55, 56, 57, 59, 60, 62, 63, 64, 66, 67, 69, ...
[ "nonn" ]
A098673
[ 79, 547, 643, 751, 907, 997, 1201, 1213, 1237, 1249, 1483, 1489, 1627, 1723, 1747 ]
[ "dead" ]
A018179
[ 1, 2, 4, 7, 12, 22, 41, 76, 141, 261, 484, 899, 1667, 3093, 5739, 10648, 19759, 36664, 68034, 126243, 234256, 434686, 806603, 1496733, 2777339, 5153632, 9563084, 17745265, 32928126, 61101455, 113379904 ]
[ "nonn" ]
A270657
[ 0, 1, 1, 1, 0, 2, 1, 0, 2, 1, -1, 1, 0, 2, 2, 2, -1, 3, 1, -1, 1, 0, 2, 2, 2, -1, 3, 1, -2, 0, -1, 2, 0, 1, -1, 1, 0, 2, 2, 2, 0, 4, 2, 0, 4, 2, -3, 1, -1, 4, 2, 3, -2, 4, 1, -2, 0, -1, 2, 0, 1, ...
[ "sign", "look" ]
A025878
[ 1, 0, 0, 0, 0, 1, 1, 0, 0, 1, 1, 1, 1, 0, 1, 2, 1, 1, 2, 1, 2, 2, 1, 2, 3, 2, 2, 3, 2, 3, 4, 2, 3, 4, 3, 4, 5, 3, 4, 5, 4, 5, 6, 4, 5, 7, 5, 6, 7, 5, 7, 8, 6, 7, 9, 7, 8, 9, 7, 9, 11, 8, 9, ...
[ "nonn", "easy" ]
A372932
[ 1, 2, 29, 60, 181, 1098, 280183, 9540424, 314608765, 19504837446, 3802487264263, 22817278658868, 2943774725687279, 1037362763562236700, 3.9996579574576295e+21, 2.0560750558576222e+24, 1.1720365889571932e+26, 1.5400831041339011e+29, 1.0418447210742673e+33 ]
[ "nonn", "frac" ]
A170472
[ 1, 31, 930, 27900, 837000, 25110000, 753300000, 22599000000, 677970000000, 20339100000000, 610173000000000, 18305190000000000, 549155700000000000, 16474671000000000000, 494240130000000000000, 1.48272039e+22 ]
[ "nonn" ]
A000754
[ 1, 4, 12, 33, 96, 317, 1218, 5425, 27608, 158129, 1006574, 7048657, 53847420, 445643681, 3971876930, 37928628529, 386337833232, 4181155148673, 47912508680086, 579538956964241, 7378919177090244, 98648882783190300 ]
[ "nonn", "nice", "easy", "changed" ]
A353458
[ 1, 1, -1, 1, 1, -1, -1, 1, 0, 1, 1, -1, -1, -1, -1, 1, 1, 0, -1, 1, 1, 1, 1, -1, 1, -1, 0, -1, -1, -1, 1, 1, -1, 1, -1, 0, -1, -1, 1, 1, 1, 1, -1, 1, 0, 1, 1, -1, 0, 1, -1, -1, -1, 0, 1, -1, 1, -1, 1,...
[ "sign", "mult" ]
A370778
[ 0, 0, 0, 0, 2, 2, 3, 4, 6, 7, 8, 9, 13, 15, 17, 19, 23, 26, 28, 31, 36, 39, 42, 46, 51, 55, 58, 63, 70, 74, 79, 83, 92, 97, 102, 107, 116, 121, 127, 133, 143, 149, 156, 163, 174, 181, 187, 195, 205, 213, 220, 229, ...
[ "nonn" ]
A322440
[ 1, 0, 1, 2, 5, 7, 16, 20, 40, 55, 97, 124, 235, 287, 482, 654, 1033, 1318, 2137, 2676, 4157, 5439, 7891, 10144, 15280, 19171, 27336, 35652, 49756, 63150, 89342, 111956, 154400, 197413, 264572, 336082, 456724, 568932, 756065, 959566, 126...
[ "nonn" ]
A373233
[ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 6, 14, 15, 16, 9, 17, 18, 19, 12, 20, 21, 22, 15, 23, 24, 17, 26, 18, 26, 28, 29, 22, 21, 37, 32, 18, 23, 38, 42, 24, 26, 39, 37, 37, 31, 33, 46, 32, 41, 38, 40, 36,...
[ "nonn" ]
A381534
[ 1, 2, 4, 4, 11, 6, 22, 8, 37, 10, 56, 12, 79, 14, 106, 16, 137, 18, 172, 20, 211, 22, 254, 24, 301, 26, 352, 28, 407, 30, 466, 32, 529, 34, 596, 36, 667, 38, 742, 40, 821, 42, 904, 44, 991, 46, 1082, 48, 1177, 50, 12...
[ "nonn", "easy" ]
A240010
[ 1, 0, 1, 1, 1, 2, 2, 4, 3, 7, 6, 11, 11, 17, 19, 27, 31, 41, 51, 62, 79, 95, 121, 142, 182, 212, 269, 314, 393, 459, 570, 665, 816, 958, 1160, 1364, 1639, 1928, 2297, 2706, 3200, 3768, 4434, 5212, 6105, 7170, 8361, 9799, ...
[ "nonn" ]
A371958
[ 10, 10, 30, 102, 120, 240, 1260, 1680, 8596, 34580, 113760, 576840, 3579840, 14938560, 109133640 ]
[ "nonn", "base", "more" ]
A002115
[ 1, 1, 19, 1513, 315523, 136085041, 105261234643, 132705221399353, 254604707462013570, 705927677520644100000, 2.7167780107671555e+24, 1.4050650308943101e+28, 9.509606513261074e+31, 8.238139364073374e+35 ]
[ "nonn" ]
A328187
[ 1, 1, 1, 1, 2, 1, 4, 1, 5, 3, 8, 1, 14, 1, 16, 9, 22, 3, 38, 4, 46, 19, 58, 9, 94, 18, 106, 41, 144, 28, 221, 37, 246, 92, 318, 87, 465, 95, 530, 198, 693, 169, 963, 220, 1108, 424, 1383, 381, 1899, 492, 2216, 815,...
[ "nonn" ]
A259654
[ 2, 18, 3000, 821142, 285311509560, 302875101765444, 827240261885926400000, 1.9784196556602967e+24, 2.088046799984791e+31, 2.5676861531612113e+42, 1.7069174130723237e+46 ]
[ "nonn", "easy" ]
A246734
[ 1566, 5430, 18966, 66294, 231414, 807630, 2818830, 9838974, 34342350, 119869158, 418392870, 1460364774, 5097280614, 17791629822, 62100187038, 216755476782, 756566753022, 2640732594966, 9217254934326, 32172052811478, 112293843388758 ]
[ "nonn" ]
A211788
[ 1, 1, 1, 1, 4, 4, 1, 7, 21, 21, 1, 10, 47, 126, 126, 1, 13, 82, 324, 818, 818, 1, 16, 126, 642, 2300, 5594, 5594, 1, 19, 179, 1107, 4977, 16741, 39693, 39693, 1, 22, 241, 1746, 9335, 38642, 124383, 289510, 289510, 1, 25, 3...
[ "nonn", "easy", "tabl" ]
A092888
[ 34, 52, 60, 63, 80, 70, 52, 92, 51, 52, 126, 148, 155, 156, 76, 94, 220, 250, 110, 174, 240, 200, 187, 182, 191, 192, 190, 266, 278, 328, 320, 322, 203, 98, 250, 395, 243, 242, 160, 300, 308, 432, 160, 390, 345, 338, 349, ...
[ "nonn" ]
A251559
[ 9, 9, 9, 9, 15, 15, 21, 21, 21, 21, 21, 21, 39, 39, 39, 39, 39, 39, 39, 39, 45, 45, 45, 45, 45, 49, 49, 55, 55, 55, 55, 55, 55, 57, 57, 69, 69, 93, 93, 93, 93, 93, 93, 93, 93, 93, 93, 93, 93, 93, 93, 93, 93, 93...
[ "nonn" ]
A174647
[ -4, 0, 0, 0, -64, 0, 256, 1024, 0, -4096, -12288, 0, 49152, 131072, 0, -524288, -1310720, 0, 5242880, 12582912, 0, -50331648, -117440512, 0, 469762048, 1073741824, 0, -4294967296, -9663676416, 0, 38654705664, 85899345920, 0 ]
[ "sign" ]
A203378
[ 12, 36, 36, 108, 164, 108, 324, 748, 748, 324, 972, 3412, 5208, 3412, 972, 2916, 15564, 36300, 36300, 15564, 2916, 8748, 70996, 253068, 387324, 253068, 70996, 8748, 26244, 323852, 1764360, 4136292, 4136292, 1764360, 323852, 26244, 78732, 1477...
[ "nonn", "tabl" ]
A078524
[ 1, 2, 9, 176, 23590375, 9700106723, 77436678274508930000, 5.562533838576106e+30, 5.59498129702796e+44, 7.272912840167864e+62 ]
[ "nonn", "frac", "hard" ]
A289997
[ 1, 2, 3, 5, 6, 7, 10, 11, 13, 17, 19, 21, 22, 23, 26, 27, 29, 30, 31, 37, 38, 39, 40, 41, 43, 44, 45, 46, 47, 51, 52, 53, 57, 58, 59, 60, 61, 65, 66, 67, 68, 71, 73, 74, 75, 79, 80, 82, 83, 89, 91, 92, 97, 101,...
[ "nonn" ]
A061573
[ 1, 6, 60, 984, 24720, 890640, 43646400, 2793409920, 226266566400, 22626660268800, 2737825932441600, 394246934750592000, 66627731979077070000, 1.3059035467986284e+22, 2.9382829802982215e+24, 7.522004429563656e+26, 2.1738592801439004e+29 ]
[ "nonn" ]