id
stringlengths
7
11
seq
listlengths
1
347
keywords
listlengths
1
8
A020049
[ 1, 0, 0, 0, 0, 2, 12, 73, 518, 4192, 38083, 384010, 4256112, 51428023, 672849973, 9475970454, 142929221023, 2298778304796, 39270796040272, 710146895061597, 13551969914092152, 272168729108017400, 5738224038694033000 ]
[ "nonn" ]
A183443
[ 1, 5, 18, 72, 2054, 53608, 1744887, 216103851, 39184763856, 11314547102638, 7873316318240100, 9711485486581484000, 2.126264789925968e+22 ]
[ "nonn" ]
A116613
[ 1, 3, 6, 16, 17, 22, 25, 27, 28, 35, 38, 39, 43, 44, 48, 56, 59, 61, 67, 68, 69, 82, 99, 100, 104, 111, 113, 122, 127, 129, 132, 133, 145, 146, 156, 161, 162, 171, 172, 176, 179, 183, 186, 189, 190, 202, 209, 210, 234, ...
[ "nonn" ]
A352835
[ 0, 0, 1, 2, 0, 3, 4, 0, 5, 2, 4, 1, 6, 0, 7, 8, 0, 9, 2, 8, 1, 10, 0, 11, 4, 8, 3, 12, 0, 13, 2, 12, 1, 14, 0, 15, 16, 0, 17, 2, 16, 1, 18, 0, 19, 4, 9, 6, 8, 5, 10, 4, 16, 3, 20, 0, 21, 2, 20, 1, ...
[ "nonn", "base" ]
A192990
[ 1, 0, 0, 6, 72, 144, 288, 0, 144, 72, 37584, 95904, 98496, 51840, 11664, 25920, 31104, 1296, 7776, 1296, 53529984, 127899648, 130761216, 69921792, 17915904, 11321856, 26002944, 23887872, 10202112, 1430784, 2985984, 2612736, 124416, 373248, 31104 ]
[ "nonn", "tabf" ]
A033799
[ 1, 1, 1, 2, 1, 3, 4, 4, 4, 4, 7, 7, 10, 9, 9, 15, 13, 16, 17, 14, 24, 23, 23, 23, 26, 36, 31, 40, 34, 38, 55, 46, 52, 52, 53, 75, 67, 69, 71, 80, 100, 85, 104, 91, 98, 136, 110, 121, 129, 126, 167, 148, 152, 15...
[ "nonn" ]
A063775
[ 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2...
[ "mult", "easy", "nonn" ]
A333124
[ 0, 0, 0, 1, 1, 0, 1, 2, 2, 1, 1, 1, 2, 1, 2, 4, 4, 2, 1, 2, 2, 2, 1, 2, 3, 2, 2, 2, 3, 2, 4, 6, 6, 4, 2, 3, 3, 2, 2, 3, 3, 2, 3, 3, 2, 2, 2, 4, 5, 3, 2, 3, 3, 3, 3, 3, 4, 3, 3, 3, 5, 4, 6, 9...
[ "nonn", "base" ]
A021825
[ 0, 0, 1, 2, 1, 8, 0, 2, 6, 7, 9, 6, 5, 8, 9, 5, 2, 4, 9, 6, 9, 5, 4, 9, 3, 3, 0, 0, 8, 5, 2, 6, 1, 8, 7, 5, 7, 6, 1, 2, 6, 6, 7, 4, 7, 8, 6, 8, 4, 5, 3, 1, 0, 5, 9, 6, 8, 3, 3, 1, 3, 0, 3, 2...
[ "nonn", "cons" ]
A241226
[ 0, 12, 480, 4488, 22278, 78288, 220374, 531594, 1143648, 2254440, 4145244, 7202190, 11940444, 19029300, 29318754, 43872402, 63999528, 91288794, 127642164, 175326336, 237000816, 315772032 ]
[ "nonn", "more" ]
A005392
[ 3, 12, 15, -36, -138, 276, 4326, 21204, 65274, 126204, 204246, 1267356, 10235538, 54791316, 212311746, 678889380, 4946455134, 20113372464 ]
[ "sign", "nice" ]
A329055
[ 1, 2, 6, 21, 82, 356, 1690, 8731, 48213, 281885, 1724817, 10955956, 71747613, 481927039, 3306721747, 23103546417, 163954719933, 1179368199427, 8584854507319, 63150696347462, 468906907743356, 3511055861792836, 26489459993078576, 201226384388401600 ]
[ "nonn" ]
A051668
[ 1, 4, 4, 9, 8, 9, 16, 17, 17, 16, 25, 33, 34, 33, 25, 36, 58, 67, 67, 58, 36, 49, 94, 125, 134, 125, 94, 49, 64, 143, 219, 259, 259, 219, 143, 64, 81, 207, 362, 478, 518, 478, 362, 207, 81, 100, 288, 569, 840, 996, 9...
[ "easy", "nonn", "tabl" ]
A295032
[ 0, 1, 2, 4, 5, 8, 11, 21, 25, 105, 191, 305, 463, 704, 1320, 1404, 1580, 1675, 2215, 3475, 6323, 10560, 28817, 30356, 98198 ]
[ "nonn", "more", "hard" ]
A134808
[ 0, 101, 102, 103, 104, 105, 106, 107, 108, 109, 201, 202, 203, 204, 205, 206, 207, 208, 209, 301, 302, 303, 304, 305, 306, 307, 308, 309, 401, 402, 403, 404, 405, 406, 407, 408, 409, 501, 502, 503, 504, 505, 506, 507, 508, 509...
[ "base", "easy", "nonn" ]
A275909
[ 1, 5, 20, 75, 288, 1094, 4171, 15897, 60565, 230816, 879521, 3351544, 12771524, 48667365, 185453453, 706693601, 2692945820, 10261812539, 39103937948, 149010523846, 567823518619, 2163763618201, 8245296020629, 31419747421972, 119728937140293, 456242317652464, 173856...
[ "nonn", "easy" ]
A196788
[ 1, 1805, 133, 2, 3, 4, 5, 13, 6, 9, 8, 10, 19, 16, 32, 24, 74, 30, 18, 60, 168, 20, 42, 90, 180, 210, 186, 408, 144, 1020, 1050, 900, 2520, 3348, 2850, 5520, 3390, 774, 5760 ]
[ "nonn", "more" ]
A326835
[ 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33, 35, 37, 39, 41, 43, 45, 47, 49, 51, 53, 55, 57, 59, 61, 65, 67, 69, 71, 73, 75, 77, 79, 81, 83, 85, 87, 89, 91, 93, 95, 97, 99, 101, 103, 105, 107, ...
[ "nonn" ]
A247415
[ 1, 4, 14, 51, 187, 695, 2606, 9842, 37386, 142693, 546790, 2102312, 8106308, 31335060, 121390028, 471159761, 1831860961, 7133082300, 27813493104, 108585087657, 424396534100, 1660418620528, 6502345229958, 25485677806201, 99969379431223, 392424954930562, 15414946226...
[ "nonn" ]
A100138
[ 1, 2, 4, 8, 16, 32, 66, 144, 336, 832, 2144, 5632, 14852, 38968, 101312, 260736, 664704, 1681152, 4226056, 10578080, 26407648, 65838848, 164095360, 409129472, 1020795408, 2549137824, 6371133120, 15935185792, 39878810624, 99837958144 ]
[ "easy", "nonn" ]
A153654
[ 2, 23, 23, 2, 1054, 2, 2, 12165, 12165, 2, 2, 13041, 484928, 13041, 2, 2, 13917, 5814074, 5814074, 13917, 2, 2, 14793, 11526908, 223541684, 11526908, 14793, 2, 2, 15669, 17623430, 2775818930, 2775818930, 17623430, 15669, 2, 2, 16545, 241036...
[ "nonn", "tabl", "easy", "less" ]
A033211
[ 23, 127, 137, 151, 233, 239, 281, 359, 431, 449, 487, 673, 743, 751, 911, 953, 967, 977, 1033, 1087, 1103, 1129, 1303, 1409, 1423, 1439, 1481, 1663, 1759, 1871, 1873, 2017, 2039, 2081, 2129, 2137, 2207 ]
[ "nonn", "easy" ]
A126869
[ 1, 0, 2, 0, 6, 0, 20, 0, 70, 0, 252, 0, 924, 0, 3432, 0, 12870, 0, 48620, 0, 184756, 0, 705432, 0, 2704156, 0, 10400600, 0, 40116600, 0, 155117520, 0, 601080390, 0, 2333606220, 0, 9075135300, 0, 35345263800, 0, 137846528820, 0, 5382...
[ "nonn", "easy" ]
A235614
[ 0, 0, 1, 1, 2, 2, 2, 2, 3, 2, 2, 4, 1, 3, 3, 2, 3, 3, 3, 3, 5, 2, 3, 5, 3, 3, 3, 2, 4, 6, 2, 4, 3, 2, 4, 4, 4, 2, 6, 4, 4, 6, 2, 5, 2, 3, 7, 5, 4, 4, 6, 1, 2, 6, 5, 4, 5, 4, 5, 5, 1, 4, 7, 5...
[ "nonn" ]
A164609
[ 1, 13, 113, 909, 7169, 56237, 440497, 3448941, 27000961, 211377613, 1654759793, 12954178509, 101410868609, 793887651437, 6214891748017, 48652827405741, 380875114341121, 2981653077513613, 23341653831337070, 182728435995639300 ]
[ "nonn", "easy" ]
A150565
[ 1, 2, 7, 26, 107, 455, 1997, 8960, 40802, 188190, 876126, 4110613, 19409604, 92128043, 439257473, 2102256709, 10094370187, 48608230113, 234652253431, 1135270546210, 5503323842213, 26724710156090, 129982634911257, 633105351011227, 3087646339418001, 15076130618030798,...
[ "nonn", "walk" ]
A194160
[ 1, 4, 7, 2, 8, 8, 5, 9, 2, 9, 0, 9, 9, 5, 6, 9, 3, 1, 4, 6, 0, 7, 1, 3, 4, 2, 8, 1, 5, 0, 3, 8, 1, 5, 9, 3, 2, 2, 6, 9, 6, 2, 9, 5, 1, 5, 2, 6, 5, 6, 9, 9, 0, 5, 3, 7, 1, 1, 1, 5, 8, 6, 2, 3...
[ "nonn", "easy", "cons" ]
A300093
[ 1, 31, 35, 203, 1301, 5953, 27614, 144519, 776608, 3821064, 19962513, 103746227, 535063613, 2771357972, 14375163019, 74568759679, 386533174452, 2005734089722, 10407260376872, 53998060391182, 280214290908821, 1454188530783568 ]
[ "nonn" ]
A335675
[ 10, 16, 50, 52, 126, 124, 250, 244, 434, 432, 690, 710, 1032, 1066, 1552, 1576, 2114, 2190, 2874, 2946, 3806, 3958, 5022, 5054, 6236, 6380, 7946, 8106, 9612, 10060, 11744, 12104, 14320, 14736, 17006, 17560, 20050, 20586, 23824, 24310 ]
[ "nonn" ]
A255201
[ 0, 2, 2, 4, 2, 4, 2, 6, 4, 4, 2, 6, 2, 4, 4, 8, 2, 6, 2, 6, 4, 4, 2, 8, 4, 4, 6, 6, 2, 6, 2, 10, 4, 4, 4, 8, 2, 4, 4, 8, 2, 6, 2, 6, 6, 4, 2, 10, 4, 6, 4, 6, 2, 8, 4, 8, 4, 4, 2, 8, 2, 4, 6, ...
[ "nonn" ]
A353381
[ 0, 1, 1, 1, 1, 2, 1, 1, 1, 3, 1, 2, 1, 2, 2, 2, 1, 2, 1, 3, 3, 3, 1, 3, 1, 2, 1, 2, 1, 5, 1, 2, 2, 3, 2, 2, 1, 2, 3, 4, 1, 5, 1, 3, 2, 3, 1, 4, 1, 3, 2, 2, 1, 3, 3, 3, 3, 2, 1, 5, 1, 3, 3, 2...
[ "nonn" ]
A247612
[ 1, 15, 120, 680, 3060, 11628, 38760, 116280, 316767, 788161, 1805100, 3840420, 7660250, 14446134, 25947612, 44668692, 74091645, 118941555, 185495056, 281936688, 418766304, 609260960, 869994720, 1221419808, 1688512539, 2301487461, 3096583140, 4116923020 ]
[ "nonn", "easy" ]
A324962
[ 1, 5, 29, 196, 1519, 13293, 129681, 1395504, 16420458, 209724450, 2889435185, 42711906510, 674273776409, 11321518590991, 201460954569411, 3787078288117632, 74989404135333180, 1560115234974759700, 34021998346437480000, 776044059807136100000, 1.8479631810762197e+22, 4.5857199...
[ "nonn" ]
A241891
[ 1, 2, 4, 8, 20, 72, 244, 968, 3700, 14792, 58484, 233928, 932980, 3731912, 14916724, 59666888, 238623860, 954495432, 3817806964, 15271227848, 61084212340, 244336849352, 977344601204, 3909378404808, 15637502434420 ]
[ "nonn", "easy" ]
A341925
[ 1, 2, 16, 122, 925, 7066, 54560, 426462, 3372291, 26956270, 217614820, 1772645420, 14557912005, 120446430162, 1003264150080, 8408233633984, 70865259181716, 600341163614280, 5109974618238720, 43685248156083450, 374975710962745860, 3230692210606121000 ]
[ "nonn" ]
A129815
[ 0, 0, 1, 2, 6, 22, 102, 506, 2952, 18502, 131112, 991226, 8271792, 73176262, 703077552, 7121578106, 77437418112, 883521487942, 10726837356672, 136104948161786, 1825110309733632 ]
[ "more", "nonn" ]
A104716
[ 1, 7, 3, 22, 13, 5, 50, 34, 19, 7, 95, 70, 46, 25, 9, 161, 125, 90, 58, 31, 11, 252, 203, 155, 110, 70, 37, 13, 372, 308, 245, 185, 130, 82, 43, 15, 525, 444, 364, 287, 215, 150, 94, 49, 17, 715, 615, 516, 420, 329, ...
[ "nonn", "tabl", "easy" ]
A374994
[ 0, 1, 2, 2, 3, 4, 3, 3, 4, 5, 3, 5, 4, 5, 4, 4, 5, 6, 6, 6, 5, 5, 6, 6, 5, 6, 4, 6, 5, 5, 5, 5, 6, 7, 7, 7, 4, 9, 8, 7, 6, 8, 4, 7, 7, 8, 7, 7, 6, 7, 7, 7, 6, 6, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6...
[ "nonn" ]
A156182
[ 1, -3, -4, 99, 116, -2523, -8764, 1074243, 1242356, -48982293, -283202524, 27296351769, 94690800596, -5393115879063, -43653497804284, 22950350777886292, 26538141745926836, -1976553215554139000, -20569900661155860000, 3.4245607667797045e+21, 1.9799583458238176e+22 ]
[ "sign", "frac" ]
A024049
[ 0, 4, 24, 124, 624, 3124, 15624, 78124, 390624, 1953124, 9765624, 48828124, 244140624, 1220703124, 6103515624, 30517578124, 152587890624, 762939453124, 3814697265624, 19073486328124, 95367431640624 ]
[ "nonn", "easy" ]
A308953
[ 0, 0, 0, 0, 0, 0, 0, 7, 8, 18, 20, 44, 60, 104, 126, 180, 224, 340, 396, 551, 640, 882, 1034, 1357, 1536, 2025, 2314, 2943, 3304, 4176, 4680, 5797, 6464, 7887, 8806, 10605, 11664, 14023, 15504, 18291, 20040, 23657, 25956, 30272, ...
[ "nonn" ]
A249578
[ 0, 1, 0, 1, 2, 3, 4, 7, 12, 15, 26, 45, 56, 97, 168, 209, 362, 627, 780, 1351, 2340, 2911, 5042, 8733, 10864, 18817, 32592, 40545, 70226, 121635, 151316, 262087, 453948, 564719, 978122, 1694157, 2107560, 3650401, 6322680 ]
[ "nonn", "easy" ]
A227966
[ 1, 5, 4, 0, 6, 8, 4, 3, 2, 6, 4, 8, 6, 0, 7, 1, 6, 4, 5, 0, 6, 1, 5, 6, 1, 5, 0, 7, 2, 9, 3, 9, 2, 0, 5, 2, 0, 1, 8, 7, 5, 2, 5, 9, 6, 7, 2, 6, 2, 2, 8, 6, 5, 7, 3, 5, 4, 4, 0, 0 ]
[ "nonn", "cons", "more" ]
A301594
[ 1, 1, 3, 7, 13, 27, 55, 99, 185, 341, 604, 1064, 1863, 3181, 5411, 9123, 15167, 25051, 41083, 66715, 107703, 172735, 275034, 435484, 685753, 1073481, 1672160, 2592070, 3998278, 6140196, 9389302, 14296376, 21682534, 32759202, 49308812, 73956692, ...
[ "nonn" ]
A239846
[ 5, 35, 244, 1613, 9066, 46260, 214126, 921674, 3745690, 14493362, 53568061, 189418056, 642520724, 2097034554, 6603318291, 20113173790, 59401818885, 170482050659, 476411892763, 1298626619304, 3458363180706, 9010558662526 ]
[ "nonn" ]
A076943
[ 1, 4, 21, 20, 1555, 2604, 299593, 820, 29127, 348678440, 67546215517, 20345052, 61054982558011, 281241170407092, 76861433640456460, 2690420, 128583032925805670000, 211927625868, 2.7594105263157895e+23, 174339220 ]
[ "nice", "nonn" ]
A171103
[ 46758, 46770, 65550, 113010, 158286, 191922, 205518, 205530, 375078, 443418, 449958, 497562, 574278, 574290, 972090, 1918278, 2574522, 3034458, 4479750, 8807706, 11409894, 13311582, 13311594, 16269846, 16509018, 16578438 ]
[ "nonn" ]
A266085
[ 0, -1, 6, -12, 22, -33, 48, -64, 84, -105, 130, -156, 186, -217, 252, -288, 328, -369, 414, -460, 510, -561, 616, -672, 732, -793, 858, -924, 994, -1065, 1140, -1216, 1296, -1377, 1462, -1548, 1638, -1729, 1824, -1920, 2020, -2121, ...
[ "sign", "easy", "changed" ]
A047166
[ 0, 0, 0, 0, 1, 3, 12, 24, 60, 100, 205, 315, 630, 980, 2156, 3528, 8260, 13692, 31620, 51600, 115995, 186945, 418825, 675675, 1535391, 2492919, 5728086, 9324406, 21448791, 34860553, 80006668, 129804808, 298009048, 483483128, 1113181012, 180756097...
[ "nonn" ]
A350361
[ 4, 5, 5, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 11, 11, 11, 12, 12, 12, 12, 12, 12, 12, 12, 12, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 14, 1...
[ "nonn", "easy" ]
A041684
[ 19, 723, 27493, 1045457, 39754859, 1511730099, 57485498621, 2185960677697, 83123991251107, 3160897628219763, 120197233863602100, 4570655784445099500, 173805117042777400000, 6.609165103409986e+21, 2.5132207904662224e+23, 9.556848168875055e+24 ]
[ "nonn", "cofr", "frac", "easy" ]
A375063
[ 1, -1, 0, 0, -1, 3, -3, 1, 0, -3, 9, -9, 3, 1, -9, 22, -22, 9, 2, -22, 51, -51, 22, 6, -51, 108, -108, 50, 13, -108, 221, -221, 105, 29, -220, 429, -429, 212, 57, -426, 810, -810, 407, 113, -801, 1479, -1478, 759, 208, ...
[ "sign" ]
A253153
[ 39, 72, 88, 120, 192, 336, 624, 1200, 2352, 4656, 9264, 18480, 36912, 73776, 147504, 294960, 589872, 1179696, 2359344, 4718640, 9437232, 18874416, 37748784, 75497520, 150994992, 301989936, 603979824, 1207959600, 2415919152, 4831838256 ]
[ "nonn" ]
A282180
[ 8, 488, 116212808, 1.5695024029427002e+24, 3.866214585126516e+72 ]
[ "nonn" ]
A326252
[ 0, 0, 0, 0, 16384, 22020096, 62679678976, 556181084962816 ]
[ "nonn", "more" ]
A376920
[ 2, 19, 13, 53, 31, 71, 109, 263, 239, 167, 661, 439, 673, 1289, 1021, 2531, 3617, 5101, 1033, 3037, 2017, 4889, 4751, 3169, 887, 2521, 11467, 20143, 563, 1873, 9931, 2617, 9833, 12739, 7057, 78787, 58067, 10831, 29759, 22229, 62801, 6...
[ "nonn" ]
A125332
[ 1, 22, 142, 730, 4390, 26742, 166966, 1056350, 6755686, 43557742, 282683662, 1844363158, 12086792278, 79504493454, 524626264542, 3471321731070, 23023441009542, 153019621221454, 1018866986428048, 6795005681508340 ]
[ "nonn", "base" ]
A286415
[ 19, 23, 29, 41, 43, 47, 53, 59, 61, 67, 83, 89, 173, 271, 277, 313, 379, 397, 419, 479, 491, 571, 577, 593, 617, 631, 673, 811, 839, 877, 911, 977, 1777, 1913, 2131, 2311, 2377, 2399, 2713, 2791, 2939, 2971, 4177, 4339, 4919, ...
[ "nonn", "base" ]
A059066
[ 1, 2, 3, 0, 1, 10, 24, 27, 16, 12, 0, 1, 56, 216, 378, 435, 324, 189, 54, 27, 0, 1, 346, 1824, 4536, 7136, 7947, 6336, 3936, 1728, 684, 128, 48, 0, 1, 2252, 15150, 48600, 99350, 144150, 156753, 131000, 87075, 45000, 19300, 600...
[ "nonn", "tabf", "nice" ]
A331627
[ 1, 2, 4, 8, 10, 15, 16, 21, 32, 44, 45, 50, 52, 63, 64, 75, 99, 105, 117, 128, 130, 135, 136, 152, 153, 154, 165, 170, 182, 184, 189, 190, 195, 207, 230, 231, 232, 238, 250, 256, 266, 273, 290, 297, 310, 315, 322, 351, 3...
[ "nonn" ]
A356909
[ 1, 1, 1, 6, 25, 260, 2031, 29414, 343729, 6331464, 99347775, 2213854962, 43775364777, 1143045179484, 27318538754703, 817488701386590, 22930078960458080, 773538392955105500, 24914603847636690000, 935548306987015300000, 3.4024565857537814e+22 ]
[ "nonn" ]
A374094
[ 0, 7, 91, 637, 1729, 31213, 12103, 405769, 53599, 157339, 593047 ]
[ "nonn", "more" ]
A115629
[ 2, 1, 7, 3, 29, 30, 31, 4, 8, 9, 10, 5, 121, 122, 123, 6, 16, 11, 32, 33, 34, 35, 36, 12, 17, 13, 497, 498, 499, 500, 501, 14, 18, 15, 67, 37, 46, 38, 124, 19, 20, 125, 126, 127, 128, 129, 130, 21, 47, 39, 68, 40, ...
[ "nonn", "base" ]
A203832
[ 28125, 1330353, 66490965, 3383285769, 173185290765, 8882824128417, 455911325162757, 23404859123410810, 1201610596654827800, 61692467471143080000, 3.1674085450220705e+21, 1.6262121796680037e+23 ]
[ "nonn" ]
A154267
[ 15, 42, 69, 96, 123, 150, 177, 204, 231, 258, 285, 312, 339, 366, 393, 420, 447, 474, 501, 528, 555, 582, 609, 636, 663, 690, 717, 744, 771, 798, 825, 852, 879, 906, 933, 960, 987, 1014, 1041, 1068, 1095, 1122, 1149, 1176, 1203,...
[ "nonn", "easy" ]
A216250
[ 1, 2, 3, 5, 4, 6, 7, 8, 11, 12, 10, 9, 14, 13, 15, 16, 17, 20, 21, 24, 25, 19, 18, 23, 22, 27, 26, 28, 29, 30, 33, 34, 37, 38, 41, 42, 32, 31, 36, 35, 40, 39, 44, 43, 45, 46, 47, 50, 51, 54, 55, 58, 59, 62, 6...
[ "nonn", "tabl" ]
A015476
[ 0, 1, 5, 126, 15755, 9847001, 30771893880, 480810851722001, 37563347821553220000, 1.4673182743275038e+25, 2.8658560045496623e+31, 2.7986875044431763e+38, 1.3665466330288976e+46 ]
[ "nonn", "easy" ]
A372630
[ 1, 3, 8, 11, 12, 14, 17, 23, 30, 33, 35, 37, 41, 48, 59, 60, 65, 68, 77, 79, 82, 84, 89, 93, 94, 99 ]
[ "nonn", "more" ]
A230737
[ 102, 2016, 16536, 320970, 2382398, 46599682, 342031378, 6692078688, 49068380730, 959928337654, 7037607186036, 137677370665624, 1009342929539188, 19745940646875492, 144761390761972000, 2831990839783724500 ]
[ "nonn" ]
A062146
[ 1, 3, 11, 47, 225, 1159, 6067, 28419, 58433, -1390645, -35514309, -636045257, -10431927839, -167173905393, -2678202265885, -43236880758901, -703702453254783, -11485574113211500, -185707408082199330, -2901041900411826000 ]
[ "sign", "easy" ]
A061926
[ 0, 1, 0, 0, 1, 0, 1, 1, 1, 0, 0, 2, 2, 1, 0, 1, 2, 3, 3, 1, 0, 0, 3, 4, 6, 4, 1, 0, 1, 3, 5, 10, 9, 5, 1, 0, 0, 4, 6, 15, 16, 14, 6, 1, 0, 1, 4, 7, 21, 25, 30, 19, 7, 1, 0, 0, 5, 8, 28, 36, 55, ...
[ "nonn", "tabl" ]
A032798
[ 1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 14, 15, 16, 17, 18, 19, 21, 22, 23, 24, 25, 27, 28, 29, 30, 31, 32, 34, 35, 36, 37, 38, 40, 41, 42, 43, 44, 45, 47, 48, 49, 50, 51, 53, 54, 55, 56, 57, 58, 60, 61, 62, 63, ...
[ "nonn" ]
A356260
[ 11, 41, 101, 107, 197, 311, 461, 521, 827, 1061, 1277, 1451, 1487, 1871, 2027, 2141, 2801, 3251, 3671, 4091, 4547, 5651, 5657, 6197, 6791, 6827, 7307, 7457, 8837, 9011, 9041, 9437, 9857, 10007, 10301, 10457, 11777, 12041, 12251, 12611, ...
[ "nonn" ]
A066179
[ 11, 23, 47, 167, 359, 719, 1439, 2039, 2879, 4079, 4127, 4919, 5639, 5807, 5927, 6047, 7247, 7559, 7607, 7727, 9839, 10799, 11279, 13799, 13967, 14159, 15287, 15647, 20327, 21599, 21767, 23399, 24407, 24527, 25799, 28319, 28607, 29399 ]
[ "nonn" ]
A282995
[ 81, 2570, 96693, 3546870, 130854309, 4817792042, 177509416175, 6539125324144, 240894164469261, 8874303766960833, 326920126439954200, 12043397390708228000, 443666302338469270000, 1.6344206879501912e+22 ]
[ "nonn" ]
A253243
[ 1, 0, -2, 2, 0, -4, 1, 0, 0, 2, 0, 0, 3, 0, -4, 2, 0, 0, 2, 0, -2, 0, 0, -4, 2, 0, 0, 2, 0, -4, 1, 0, -4, 4, 0, 0, 0, 0, 0, 2, 0, 0, 3, 0, 0, 2, 0, -4, 2, 0, -4, 0, 0, 0, 4, 0, -2, 2, 0, -4, 2, ...
[ "sign" ]
A003056
[ 0, 1, 1, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10, 10, 10, ...
[ "nonn", "easy", "nice", "tabl" ]
A170709
[ 1, 28, 756, 20412, 551124, 14880348, 401769396, 10847773692, 292889889684, 7908027021468, 213516729579636, 5764951698650172, 155653695863554660, 4202649788315975000, 113471544284531340000, 3.063731695682346e+21 ]
[ "nonn" ]
A005422
[ 3, 11, 37, 101, 271, 37, 4649, 137, 333667, 9091, 513239, 9901, 265371653, 909091, 2906161, 5882353, 5363222357, 333667, 1111111111111111200, 27961, 10838689, 513239, 1.1111111111111111e+22, 99990001, 182521213001, 1058313049 ]
[ "nonn" ]
A085327
[ 1, 3, 9, 25, 67, 177, 465, 1219, 3193, 8361, 21891, 57313, 150049, 392835, 1028457 ]
[ "dead" ]
A358536
[ 3, 2, 5, 2, 7, 2, 3, 2, 5, 2, 13, 2, 3, 2, 13, 2, 19, 2, 3, 2, 7, 2, 5, 2, 3, 2, 29, 2, 5, 2, 3, 2, 73, 2, 23, 2, 3, 2, 29, 2, 43, 2, 3, 2, 47, 2, 7, 2, 3, 2, 37, 2, 113, 2, 3, 2, 11, 2, 61, 2, 3,...
[ "nonn" ]
A003089
[ 1, 1, 2, 5, 12, 30, 79, 227, 710, 2322, 8071, 29503, 112822, 450141, 1867871, 8037472, 35787667, 164551477, 779945969, 3804967442, 19079312775, 98211456209, 518397621443, 2802993986619, 15510781288250, 87765472487659, 507395402140211, 2994893000122118, 1803554...
[ "nonn", "nice" ]
A238405
[ 0, 0, 2, 0, 1, 0, 1, 2, 3, 3, 2, 2, 1, 3, 3, 1, 2, 1, 2, 5, 3, 3, 4, 1, 2, 2, 3, 3, 1, 2, 3, 4, 5, 6, 5, 3, 2, 2, 3, 3, 2, 5, 5, 4, 3, 2, 4, 3, 2, 3, 3, 2, 4, 6, 4, 6, 9, 8, 6, 4, 3, 2, 3, 4...
[ "nonn" ]
A214237
[ 715, 318511707, 590331473158067, 1.1919560566057332e+21, 2.4162703458161475e+27 ]
[ "nonn" ]
A055236
[ 2, 5, 8, 17, 20, 32, 65, 68, 80, 128, 257, 260, 272, 320, 512, 1025, 1028, 1040, 1088, 1280, 2048, 4097, 4100, 4112, 4160, 4352, 5120, 8192, 16385, 16388, 16400, 16448, 16640, 17408, 20480, 32768, 65537, 65540, 65552, 65600, 65792, 66...
[ "easy", "nonn", "tabl" ]
A197261
[ 6, 5, 0, 2, 4, 0, 6, 1, 8, 2, 1, 7, 6, 1, 8, 1, 9, 2, 0, 9, 5, 5, 5, 5, 1, 7, 2, 7, 3, 4, 6, 7, 0, 5, 1, 4, 8, 8, 1, 6, 7, 2, 1, 1, 4, 3, 0, 9, 4, 0, 6, 0, 7, 6, 9, 4, 8, 4, 8, 6, 7, 4, 7, 8...
[ "nonn", "cons" ]
A129762
[ 1, 13, 104, 615, 3149, 14912, 67537, 297945, 1293832, 5564911, 23795465, 101383680, 431003105, 1829784725, 7761645928, 32906509335, 139466630773, 590979780544, 2503927125041, 10608105770625, 44940061502216 ]
[ "nonn", "easy" ]
A288342
[ 1, 2, 4, 7, 12, 19, 30, 45, 66, 94, 132, 181, 246, 328, 433, 564, 728, 929, 1177, 1477, 1841, 2277, 2799, 3417, 4150, 5010, 6019, 7194, 8561, 10140, 11964, 14057, 16457, 19195, 22315, 25854, 29865, 34391, 39493, 45224, 51654, 58844, ...
[ "nonn", "easy" ]
A154996
[ 1, 1, 9, 65, 505, 3825, 29225, 222625, 1697625, 12940625, 98655625, 752090625, 5733565625, 43709640625, 333219515625, 2540290390625, 19365842265625, 147635019140625, 1125491941015625, 8580160087890625, 65410639259765624 ]
[ "nonn" ]
A180867
[ 3, 8, 14, 15, 40, 33, 27, 78, 96, 60, 42, 144, 189, 176, 95, 64, 228, 351, 348, 280, 138, 90, 352, 558, 648, 555, 408, 189, 125, 500, 864, 1032, 1035, 810, 560, 248, 165, 700, 1230, 1600, 1650, 1512, 1113, 736, 315, 216, 930...
[ "nonn", "tabl" ]
A070494
[ 0, 1, 8, 27, 0, 29, 24, 23, 0, 25, 8, 19, 0, 21, 24, 15, 0, 17, 8, 11, 0, 13, 24, 7, 0, 9, 8, 3, 0, 5, 24, 31, 0, 1, 8, 27, 0, 29, 24, 23, 0, 25, 8, 19, 0, 21, 24, 15, 0, 17, 8, 11, 0, 13, 24, 7, 0, 9, ...
[ "nonn", "easy" ]
A241420
[ 1, 5, 4, 9, 1, 2, 6, 5, 9, 2, 5, 7, 7, 5, 6, 2, 1, 6, 8, 3, 6, 9, 5, 7, 2, 5, 3, 3, 8, 4, 9, 4, 0, 9, 9, 2, 6, 9, 3, 7, 0, 2, 9, 8, 6, 3, 4, 1, 0, 0, 4, 8, 3, 6, 2, 8, 9, 9, 9, 9, 6, 7, 1, 0...
[ "nonn", "cons", "easy" ]
A284226
[ 16, 212, 3224, 91260, 2417194, 68272108, 1970768869, 58014691963, 1729160628627, 52018078923533, 1575778726620949, 47999422848604300, 1468666472458499800, 45105520159013910000, 1.3896420130527028e+21, 4.29286547465636e+22 ]
[ "nonn" ]
A367987
[ 1, 1, 1, 2, 1, 1, 1, 1, 2, 1, 1, 2, 1, 1, 1, 3, 1, 2, 1, 2, 1, 1, 1, 1, 2, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 4, 1, 1, 1, 1, 1, 1, 1, 2, 2, 1, 1, 3, 2, 2, 1, 2, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 2, 4...
[ "nonn", "easy", "mult" ]
A080916
[ 1, 2, 1, 2, 1, 2, 3, 4, 5, 6, 1, 2, 1, 2, 3, 4, 5, 6, 1, 2, 2, 2, 2, 1, 2, 2, 2, 2, 1, 2, 1, 2, 3, 4, 5, 6, 1, 2, 2, 2, 1, 1, 2, 1, 1, 10, 1, 2, 1, 2, 3, 4, 5, 6, 1, 2, 2, 2, 2, 2, 2, 2, 2, ...
[ "nonn" ]
A282349
[ 1, 7, 21, 35, 35, 21, 14, 43, 105, 140, 105, 42, 28, 105, 210, 210, 105, 21, 35, 147, 252, 245, 175, 105, 77, 154, 315, 455, 420, 210, 63, 147, 441, 630, 420, 105, 7, 147, 441, 525, 350, 210, 106, 126, 322, 567, 735, 560, ...
[ "nonn" ]
A157701
[ 0, 6, 4, 2, 0, 5, 8, 0, 1, 3, 8, 7, 9, 6, 8, 4, 5, 2, 3, 5, 5, 6, 1, 6, 5, 2, 2, 0, 9, 0, 4, 6, 7, 8, 0, 7, 6, 4, 7, 5, 5, 1, 9, 1, 6, 4, 4, 4, 5, 1, 2, 4, 4, 1, 3, 3, 2, 7, 8, 4, 6, 8, 3, 6...
[ "cons", "easy", "nonn" ]
A380751
[ 1, 1, 2, 1, 2, 2, 2, 1, 3, 3, 3, 4, 3, 4, 4, 1, 2, 3, 4, 5, 5, 5, 4, 5, 6, 6, 5, 6, 7, 6, 7, 1, 5, 2, 6, 3, 7, 7, 8, 8, 6, 7, 8, 9, 8, 9, 4, 9, 9, 8, 10, 7, 10, 9, 10, 10, 8, 11, 10, 9, 11, 11, ...
[ "nonn" ]
A245782
[ 1, 672, 30240, 23569920, 45532800, 14182439040, 153003540480, 403031236608, 518666803200, 13661860101120, 740344994887680, 796928461056000, 212517062615531520, 87934476737668060000, 154345556085770650000, 170206605192656160000, 1.1614923883334693e+21, 1.8025827803703647e+21 ]
[ "nonn" ]
A380217
[ 1, 15, 42, 54, 75, 77, 95, 99, 100, 132, 182, 195, 221, 234, 245, 253, 290, 312, 315, 329, 350, 357, 405, 420, 423, 437, 450, 459, 476, 494, 510, 540, 555, 559, 560, 612, 627, 665, 715, 720, 740, 798, 816, 833, 854, 855, 858...
[ "nonn" ]