id
stringlengths
7
11
seq
listlengths
1
347
keywords
listlengths
1
8
A351567
[ 0, 0, 0, 1, 0, 2, 0, 1, 1, 1, 1, 2, 0, 2, 2, 1, 2, 2, 0, 3, 3, 1, 3, 2, 0, 4, 4, 1, 4, 2, 0, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 2, 1, 2, 2, 1, 2, 2, 1, 3, 3, 1, 3, 2, 1, 4, 4, 1, 4, 2, 0, 2, 2, 1...
[ "nonn", "base" ]
A179626
[ 1, 1, 1, 1, 1, 5, 3, 1, 1, 1, 3, 1, 5, 3, 1, 5, 1, 1, 5, 1, 7, 3, 1, 1, 1, 3, 1, 7, 13, 1, 1, 1, 5, 1, 5, 3, 5, 1, 1, 3, 1, 5, 1, 3, 1, 1, 5, 9, 11, 5, 9, 11, 1, 1, 1, 1, 5, 1, 1, 3, 1, 1, 1, ...
[ "nonn" ]
A042654
[ 29, 88, 117, 205, 322, 1171, 1493, 10129, 11622, 21751, 142128, 163879, 633765, 797644, 1431409, 2229053, 8118568, 473105997, 1427436559, 1900542556, 3327979115, 5228521671, 19013544128, 24242065799 ]
[ "nonn", "cofr", "frac", "easy" ]
A103157
[ 70, 17550, 635376, 9691375, 88201170, 566685735, 2829877120, 11671285626, 41417124750, 130179173740, 370215608400, 968104633665, 2357084537626, 5396491792125, 11710951848960, 24246290643940, 48151733324310, 92140804597626, 170538695998000, 306294282269955 ]
[ "easy", "nonn" ]
A309327
[ 1, 1, 5, 85, 5525, 1419925, 1455423125, 5962868543125, 97701601079103120, 6.403069829921181e+21, 1.6785327405646882e+27, 1.760070825503099e+33, 7.382273863761776e+39, 1.2385401056575975e+47 ]
[ "nonn" ]
A108155
[ -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 14, 15, 16, 17, 18, 30, 31, 32, 33, 34, 62, 63, 64, 65, 66, 126, 127, 128, 129, 130, 254, 255, 256, 257, 258, 510, 511, 512, 513, 514, 1022, 1023, 1024, 1025, 1026, 2046, 2047, 204...
[ "sign" ]
A277855
[ 1, 2, 1, 3, 2, 2, 1, 1, 1, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2...
[ "nonn", "tabf" ]
A194701
[ 0, 1, 4, 8, 16, 22, 24, 22, 40, 40, 32, 32, 56, 74, 96, 66 ]
[ "nonn" ]
A317533
[ 1, 2, 2, 3, 4, 3, 5, 14, 9, 5, 7, 28, 33, 16, 7, 11, 69, 104, 74, 29, 11, 15, 134, 294, 263, 142, 47, 15, 22, 285, 801, 948, 599, 263, 77, 22, 30, 536, 2081, 3058, 2425, 1214, 453, 118, 30, 42, 1050, 5212, 9769, 9276, ...
[ "nonn", "tabl" ]
A075132
[ 1, 4, 33, 356, 4415, 59690, 855925, 12809620, 198034395, 3140695856, 50845026815, 837207042270, 13982565667915, 236366796137230, 4037392483733629, 69589308151724080, 1209013441314792000 ]
[ "nonn" ]
A213793
[ 1, 1, 2, 4, 18, 112, 1760, 35150, 1944530, 133948836, 26615510712, 6549149852112, 4762109992158288, 4274712091685443600, 1.1528251571501588e+22, 3.829541317914504e+25, 3.8686000187578336e+29, 4.805622573099375e+33 ]
[ "nonn" ]
A186581
[ 43046721, 8824, 38608, 192026, 805791, 1728546, 2296065, 2604716, 2927679, 3089510, 3313917, 4090548, 6218902, 9961241, 15014753, 21788652, 31911831, 45586648, 62332637, 84072672, 116767981, 164051247, 227583882, 314652408 ]
[ "nonn" ]
A201944
[ 5, 7, 5, 2, 9, 2, 4, 8, 3, 7, 0, 9, 3, 3, 1, 9, 7, 4, 7, 6, 7, 4, 6, 6, 8, 6, 6, 8, 0, 6, 8, 9, 4, 0, 9, 7, 8, 8, 3, 4, 1, 8, 7, 4, 7, 4, 2, 2, 1, 2, 1, 1, 7, 0, 5, 9, 1, 6, 9, 6, 2, 5, 9, 0...
[ "nonn", "cons" ]
A369685
[ 1, 1, 2, 6, 30, 60, 60, 60, 420, 1260, 2520, 2520, 2520, 27720, 27720, 27720, 27720, 27720, 138600, 138600, 138600, 138600, 138600, 138600, 277200, 277200, 277200, 277200, 277200, 277200, 1940400, 25225200, 75675600, 75675600, 75675600, 75675600,...
[ "nonn" ]
A291652
[ 1, 1, 0, 1, 1, 0, 1, 2, 1, 0, 1, 3, 3, 2, 0, 1, 4, 6, 6, 3, 0, 1, 5, 10, 13, 11, 5, 0, 1, 6, 15, 24, 27, 20, 9, 0, 1, 7, 21, 40, 55, 54, 38, 15, 0, 1, 8, 28, 62, 100, 120, 109, 70, 26, 0, 1, 9, 36, 91...
[ "nonn", "tabl" ]
A330531
[ 1, 6, 2, 3, 4, 9, 8, 12, 5, 18, 7, 24, 10, 15, 14, 21, 16, 27, 20, 30, 11, 36, 13, 42, 17, 48, 19, 54, 22, 33, 26, 39, 28, 45, 32, 51, 34, 57, 38, 60, 23, 66, 25, 72, 29, 78, 31, 84, 35, 90, 37, 96, 40, 63, 4...
[ "nonn" ]
A332488
[ 3, 1, 1, 1, 2, 11, 4, 1, 1, 1, 2, 5, 7, 2, 1, 1, 1, 3, 20, 2, 1, 1, 1, 2, 23, 3, 1, 1, 1, 2, 7, 5, 1, 1, 1, 1, 4, 10, 2, 1, 1, 1, 3, 177, 3, 1, 1, 1, 2, 11, 4, 1, 1, 1, 2, 5, 6, 2, 1, 1, 1, 3, ...
[ "nonn", "easy" ]
A006958
[ 1, 2, 4, 9, 20, 46, 105, 242, 557, 1285, 2964, 6842, 15793, 36463, 84187, 194388, 448847, 1036426, 2393208, 5526198, 12760671, 29466050, 68041019, 157115917, 362802072, 837759792, 1934502740, 4467033943, 10314998977, 23818760154, 55000815222, 12700450076...
[ "nonn", "nice" ]
A212636
[ 1, 1, 3, 3, 8, 1, 1, 1, 5, 7, 19, 7, 5, 15, 7, 17, 5, 3, 9, 11, 63, 9, 5, 1, 53, 27, 51, 11, 3, 11, 13, 15, 17, 35, 1, 17, 21, 13, 139, 61, 3, 13, 1, 7, 147, 23, 123, 47, 41, 35, 11, 39, 69, 21, 123, 29, ...
[ "nonn" ]
A129704
[ -1, -1, 1, 2, 1, -1, -4, -4, 3, 10, 7, -6, -20, -18, 12, 47, 39, -27, -100, -89, 53, 224, 202, -115, -490, -453, 232, 1080, 1028, -484, -2377, -2309, 985, 5222, 5213, -2005, -11488, -11724, 4043, 25226, 26387, -8062, -55420 ]
[ "sign", "easy" ]
A381778
[ 1, 2, 9, 60, 474, 4105, 37681, 360122, 3545320, 35705553, 366126614, 3809497971, 40119258081, 426829897847, 4580629916321, 49527776299522, 539025763347730, 5900193301962178, 64913644702760250, 717433047054490000, 7961616716665723000, 88679610762886200000 ]
[ "nonn" ]
A089315
[ 14741, 74747, 1414741, 1474141, 14141414141, 14141414741, 14141474741, 14147414741, 14147474141, 74141414147, 1474741414141, 7474141474747, 7474741414747, 14141474141414140, 14147414747474740, 14147474147474740 ]
[ "easy", "nonn", "base" ]
A000468
[ 1, 12, 144, 1750, 23420, 303240, 3641100, 46113200, 575360400, 7346545000, 112402762000, 1351035564000, 16432451210000, 221411634520000, 2657142036440000, 34327724461500000, 434157115760200000, 5432127413542400000, 67405553164731000000, 1.053071060221172e+21 ]
[ "nonn", "base", "easy", "nice" ]
A294575
[ 144, 162, 174, 186, 192, 198, 200, 204, 216, 220, 222, 228, 230, 234, 238, 240, 246, 250, 252, 258, 260, 264, 266, 270, 276, 280, 282, 288, 290, 294, 300, 306, 308, 310, 312, 318, 320, 322, 324, 330, 336, 340, 342, 348, 350, 3...
[ "nonn" ]
A377186
[ 1, 0, 6, 6, 30, 60, 170, 420, 1050, 2660, 6552, 16380, 40362, 99792, 245520, 603372, 1480050, 3624192, 8863712, 21647340, 52811616, 128700000, 313341756, 762206016, 1852565650, 4499346072, 10919990460, 26485897932, 64201490352, 155536089240, 376606931436 ]
[ "nonn" ]
A378929
[ 0, 1, 1, 3, 1, 0, 1, 2, 2, 0, 1, 2, 1, 0, 3, 4, 1, 2, 1, 4, 3, 0, 1, 2, 1, 0, 4, 4, 1, 3, 1, 6, 3, 0, 1, 4, 1, 0, 3, 2, 1, 3, 1, 4, 4, 0, 1, 5, 1, 0, 3, 4, 1, 4, 1, 2, 3, 0, 1, 2, 1, 0, 4, 8...
[ "nonn" ]
A383426
[ 4, 14, 22, 25, 33, 40, 43, 51, 61, 69, 72, 80, 90, 98, 101, 108, 116, 119, 127, 137, 145, 148, 156, 163, 166, 174, 177, 184, 192, 195, 203, 213, 221, 224, 232, 239, 242, 250, 260, 268, 271, 279, 286, 289, 297 ]
[ "nonn" ]
A072685
[ 1, 2, 3, 6, 7, 8, 10, 15, 16, 23, 27, 28, 33, 37, 38, 40, 50, 60, 70, 74, 75, 79, 83, 87, 88, 93, 97, 98, 104, 105, 109, 111, 112, 120, 124, 125, 129, 130, 134, 135, 139, 143, 147, 148, 153, 157, 158, 163, 167, 168, ...
[ "easy", "nonn", "word" ]
A274092
[ 0, 0, 0, 1, 1, -1, 4, 1, -4, 9, -1, -9, 15, -7, -15, 20, -15, -20, 23, -28, -23, 23, -43, -23, 20, -61, -20, 11, -80, -11, -2, -100, 2, -21, -119, 21, -46, -137, 46, -76, -151, 76, -111, -162, 111, -150, -167, 150, -194,...
[ "sign" ]
A353322
[ 0, 0, 1, 0, 2, 0, 2, 2, 1, 0, 4, 0, 2, 8, 0, 0, 1, 8, 4, 8, 2, 8, 2, 2, 1, 8, 4, 8, 2, 8, 2, 2, 1, 8, 4, 8, 2, 8, 2, 2, 1, 8, 4, 8, 2, 8, 2, 2, 1, 8, 4, 8, 2, 8, 2, 2, 1, 8, 4, 8, 2, 8, 2, 2...
[ "nonn" ]
A323944
[ 1, 1, 1, 2, 3, 3, 1, 4, 8, 12, 5, 2, 10, 29, 48, 36, 15, 3, 25, 95, 193, 185, 114, 32, 6, 70, 329, 757, 933, 706, 316, 80, 10, 196, 1094, 2896, 4239, 3960, 2304, 866, 176, 20, 574, 3659, 10834, 18468, 20313, 14787, 7184,...
[ "nonn", "tabf" ]
A017557
[ 3, 15, 27, 39, 51, 63, 75, 87, 99, 111, 123, 135, 147, 159, 171, 183, 195, 207, 219, 231, 243, 255, 267, 279, 291, 303, 315, 327, 339, 351, 363, 375, 387, 399, 411, 423, 435, 447, 459, 471, 483, 495, 507, 519, 531, 543, 555,...
[ "nonn", "easy" ]
A002190
[ 0, 1, 1, 4, 33, 456, 9460, 274800, 10643745, 530052880, 32995478376, 2510382661920, 229195817258100, 24730000147369440, 3113066087894608400, 452168671458789800000, 7.505930595633184e+22, 1.4121026957032156e+25, 2.988687741694685e+27 ]
[ "nonn", "nice" ]
A297047
[ 0, 2, 10, 41, 154, 562, 2023, 7240, 25842, 92129, 328270, 1169390, 4165231, 14835316, 52837774, 188186161, 670237602, 2387090906, 8501757271, 30279468752, 107841945274, 384084812929, 1367938393414, 4871984909782, 17351831683935, 61799465142812, 220102059235510 ]
[ "nonn", "easy" ]
A317415
[ 0, 51, 22, 13, 24, 19, 10, 17, 12, 23, 14, 21, 16, 11, 18, 9, 20, 15, 28, 5, 26, 31, 8, 33, 6, 25, 44, 3, 46, 41, 66, 107, 148, 35, 40, 1, 38, 43, 4, 27, 56, 85, 2, 37, 32, 7, 34, 29, 50, 45, 70, 103, 142, 95, ...
[ "nonn", "fini", "full" ]
A220222
[ 1, 0, 1, 2, 0, 2, 3, 12, 0, 6, 28, 24, 72, 0, 24, 125, 400, 180, 480, 0, 120, 1146, 2220, 4680, 1440, 3600, 0, 720, 8827, 29064, 30870, 53760, 12600, 30240, 0, 5040, 94200, 272272, 545328, 409920, 638400, 120960, 282240, 0, 4032...
[ "nonn", "tabl" ]
A292156
[ 0, 0, 0, 0, 0, 36, 0, 0, 168, 220, 0, 0, 524, 944, 1960, 0, 0, 1292, 2848, 6752, 15752, 0, 0, 2736, 7248, 20280, 55904, 120212, 0, 0, 5088, 15576, 48576, 156224, 378824, 1068008 ]
[ "nonn", "tabl", "more" ]
A210375
[ 0, 1, 16, 44, 80, 125, 180, 246, 324, 415, 520, 640, 776, 929, 1100, 1290, 1500, 1731, 1984, 2260, 2560, 2885, 3236, 3614, 4020, 4455, 4920, 5416, 5944, 6505, 7100, 7730, 8396, 9099, 9840, 10620, 11440, 12301, 13204, 14150, 15140, 161...
[ "nonn", "easy" ]
A261066
[ 6, 150, 180150, 519264540150, 8.62834120503063e+24, 4.7646894048274834e+51 ]
[ "nonn" ]
A290609
[ 1, 2, 5, 16, 79, 857, 49049, 75511755 ]
[ "nonn", "more" ]
A294331
[ 1, 1, 2, 8, 60, 732, 12672, 283704, 7757526, 249885110, 9255184676, 387336669496, 18075315527932, 930651571119228, 52411013929403760, 3205007479811374600, 211500660045169230000, 1.4981245823696876e+22, 1.1337476672256838e+24, 9.129422576621287e+25, 7.793993663152147e+27, 7....
[ "nonn" ]
A261936
[ 0, 2, 218, 7943, 5488030, 1247810761 ]
[ "nonn" ]
A139185
[ 11, 71, 503, 4031, 36287, 362879, 3991679, 47900159, 622702079, 8717829119, 130767436799, 2092278988799, 35568742809599, 640237370572799, 12164510040883200, 243290200817664000 ]
[ "nonn", "easy" ]
A101406
[ 3, 2, 3, 2, 2, 3, 3, 19, 2, 2, 45, 7, 15, 7, 5, 5, 44, 2, 4, 3, 84, 62, 128, 5, 4, 90, 16, 37, 15, 11, 311, 15, 295, 72, 3, 3, 242, 2, 126, 64, 152, 11, 78, 26, 2, 13, 14, 26, 140, 2, 24, 16, 157, 4, 49, 13...
[ "nonn" ]
A116166
[ 0, 16, 384, 6144, 81920, 983040, 11010048, 117440512, 1207959552, 12079595520, 118111600640, 1133871366144, 10720238370816, 100055558127616, 923589767331840, 8444249301319680, 76561193665298430, 689050742987685900 ]
[ "nonn", "easy" ]
A079563
[ 1, 14, 231, 3934, 67851, 1177974, 20531770, 358788696, 6281076123, 110103674128, 1931983053056, 33926800240578, 596145343139514, 10480467311987778, 184327560283768770, 3243034966775972400, 57074433199551440000 ]
[ "nonn" ]
A125025
[ 3, 8, 3, 8, 3 ]
[ "nonn", "hard", "more" ]
A021512
[ 0, 0, 1, 9, 6, 8, 5, 0, 3, 9, 3, 7, 0, 0, 7, 8, 7, 4, 0, 1, 5, 7, 4, 8, 0, 3, 1, 4, 9, 6, 0, 6, 2, 9, 9, 2, 1, 2, 5, 9, 8, 4, 2, 5, 1, 9, 6, 8, 5, 0, 3, 9, 3, 7, 0, 0, 7, 8, 7, 4, 0, 1, 5, 7...
[ "nonn", "cons" ]
A187984
[ 0, 5, 11, 39, 144, 467, 1673, 5825, 20404, 72246, 255137, 905611, 3220635, 11472797, 40956011, 146412581, 524169045, 1878990744, 6743276222, 24225861208, 87117117408, 313552816720, 1129460906243, 4071526431770, 14687417557462, 53016891233217, 191489301052386, 69...
[ "nonn" ]
A228245
[ 10, 10, 1, 9, 9, 1, 8, 8, 1, 7, 7, 1, 6, 6, 1, 5, 5, 1, 4, 4, 1, 3, 3, 1, 2, 2, 1, 1, 1, 1, 0 ]
[ "nonn", "easy", "fini", "full" ]
A388429
[ 21, 42, 43, 49, 69, 77, 84, 86, 87, 98, 99, 105, 138, 139, 145, 154, 155, 161, 165, 168, 172, 174, 175, 181, 196, 198, 199, 210, 211, 217, 221, 237, 276, 278, 279, 290, 291, 297, 308, 310, 311, 322, 323, 329, 330, 331, 336, ...
[ "nonn" ]
A300956
[ 0, 2, 1, 18, 20, 19, 9, 11, 10, 6, 8, 7, 24, 26, 25, 15, 17, 16, 3, 5, 4, 21, 23, 22, 12, 14, 13, 774840978, 774840980, 774840979, 774840996, 774840998, 774840997, 774840987, 774840989, 774840988, 774840984, 774840986, 774840985, 77484100...
[ "nonn", "base" ]
A172289
[ 3, 8, 15, 26, 39, 56, 75, 98, 127, 158, 199, 242, 289, 342, 403, 474, 547, 626, 709, 798, 895, 1002, 1111, 1224, 1351, 1488, 1627, 1778, 1941, 2108, 2281, 2460, 2641, 2832, 3025, 3222, 3421, 3632, 3855, 4082, 4311, 4550, 4791, 504...
[ "easy", "nonn" ]
A296710
[ 11, 12, 13, 14, 15, 16, 17, 21, 22, 23, 24, 25, 26, 31, 32, 33, 34, 35, 41, 42, 43, 44, 51, 52, 53, 61, 62, 71, 92, 93, 94, 95, 96, 97, 98, 101, 102, 103, 104, 105, 106, 107, 111, 112, 113, 114, 115, 116, 121, 122, 1...
[ "nonn", "base", "easy" ]
A166566
[ 3, 13, 23, 29, 31, 41, 43, 61, 67, 83, 89, 113, 127, 131, 163, 167, 181, 223, 233, 239, 241, 269, 271, 277, 283, 293, 311, 347, 349, 383, 421, 431, 439, 443, 457, 461, 463, 467, 479, 487, 523, 541, 547, 563, 569, 613, 617, ...
[ "nonn", "base" ]
A202213
[ 1, 1, 2, 6, 24, 119, 708, 4914, 38976, 347765, 3447712, 37598286, 447294144, 5764747515, 80011430240, 1189835682714, 18873422539776, 318085061976105, 5676223254661760, 106919460527212940, 2119973556022047700, 44136046410218670000, 962630898723772600000 ]
[ "nonn" ]
A200284
[ 1, 2, 8, 6, 1, 2, 8, 0, 2, 6, 7, 4, 5, 9, 0, 9, 9, 6, 5, 2, 7, 9, 1, 5, 1, 1, 2, 6, 1, 4, 6, 3, 7, 9, 4, 2, 3, 5, 1, 2, 6, 4, 2, 7, 5, 6, 5, 2, 8, 4, 4, 1, 9, 4, 6, 0, 0, 6, 6, 9, 7, 2, 2, 3...
[ "nonn", "cons" ]
A355544
[ 1, 3, 6, 37, 75, 668, 1075, 37732, 742767, 1811865, 3140083, 8937770, 108268896, 282951249, 633932500, 1275584757, 60455590365 ]
[ "nonn", "more" ]
A147599
[ 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 2, 1, 0, 1, 2, 1, 0, 1, 3, 1, 0, 2, 3, 1, 0, 3, 4, 1, 1, 4, 4, 1, 1, 5, 5, 1, 2, 7, 5, 1, 3, 8, 6, 1, 5, 10, 6, 2, 6, 12, 7, 2, 9, 14, 7, ...
[ "nonn" ]
A081300
[ 1, 5, 55, 481, 10501, 117181, 3879331, 52751105, 2351234953, 37766866501, 2120129149711, 39311679607201, 2663716583547085, 56019878838007090, 4448878347069812000, 104660471059169180000, 9.53425149730502e+21 ]
[ "easy", "nonn" ]
A163459
[ 1, 8, 65, 534, 4421, 36796, 307357, 2573586, 21584425, 181223408, 1522659737, 12799736142, 107631298349, 905250578212, 7614837072565, 64060941839946, 538955843348689, 4534517540404184, 38152320928270190, 321010168596786050 ]
[ "nonn" ]
A084186
[ 1, 3, 40, 17, 74, 265, 31, 336, 11937, 1403, 8894, 3524, 33223, 126903, 3067, 109312, 390536, 553171, 280266, 962560, 1747112, 1740081, 30793169, 13109551, 118101037, 1077718187, 44908294, 1528865059, 1647265647, 3913429742, 10501492774, 4702573600, 81...
[ "base", "nonn", "hard" ]
A373860
[ 1, 2, 3, 4, 6, 8, 9, 12, 10, 14, 5, 15, 20, 7, 18, 16, 21, 28, 22, 24, 11, 27, 33, 30, 26, 25, 36, 13, 35, 39, 40, 32, 34, 38, 17, 42, 19, 51, 57, 45, 48, 44, 46, 50, 23, 54, 52, 56, 58, 49, 69, 63, 60, 29, 6...
[ "nonn" ]
A094113
[ 1, 7, 44, 268, 1609, 9583, 56792, 335448, 1976689, 11627735, 68308580, 400870468, 2350563097, 13773547487, 80663415344, 472175746096, 2762854639585, 16160861104423, 94502471413916, 552472329537660 ]
[ "nonn" ]
A181690
[ -1, -4, 1, -11, 6, -1, -26, 23, -8, 1, -57, 72, -39, 10, -1, -120, 201, -150, 59, -12, 1, -247, 522, -501, 268, -83, 14, -1, -502, 1291, -1524, 1037, -434, 111, -16, 1, -1013, 3084, -4339, 3598, -1905, 656, -143, 18, -1, -2036...
[ "sign", "tabl" ]
A092631
[ 22, 25, 27, 32, 33, 35, 52, 55, 57, 72, 75, 77, 222, 225, 232, 235, 237, 252, 253, 255 ]
[ "dead" ]
A063523
[ 0, 1, 18, 67, 164, 325, 566, 903, 1352, 1929, 2650, 3531, 4588, 5837, 7294, 8975, 10896, 13073, 15522, 18259, 21300, 24661, 28358, 32407, 36824, 41625, 46826, 52443, 58492, 64989, 71950, 79391, 87328, 95777, 104754, 114275, 124356, 135013, ...
[ "nonn", "easy" ]
A215649
[ 0, 0, 1, 1, 2, 4, 7, 18, 31, 42, 44, 405, 472, 729, 941, 5071, 6313, 8675, 9853, 21066, 31591, 90601, 447014, 514121, 674557, 713322, 770074, 4606468, 7359831, 7575552, 8089735, 19520951, 52494292, 69005989, 106799181, 474396516, 777547433, 2...
[ "nonn", "base", "easy" ]
A149581
[ 1, 1, 5, 15, 53, 201, 773, 2931, 11729, 46807, 187335, 762821, 3124945, 12808863, 52974987, 220149043, 916268057, 3831280947, 16081745835, 67615084323, 285092046863, 1205489408461, 5105695775689, 21666537365021, 92139791974945, 392421722005823, 1673781863814147, ...
[ "nonn", "walk" ]
A080166
[ 3, 7, 13, 29, 31, 53, 59, 61, 97, 101, 103, 107, 109, 113, 127, 193, 197, 199, 211, 223, 227, 229, 233, 239, 241, 251, 389, 397, 401, 409, 419, 421, 431, 433, 439, 443, 449, 457, 461, 463, 467, 479, 487, 491, 499, 503, 509, ...
[ "nonn", "base" ]
A023088
[ 0, 1782, 2178, 16782, 17604, 17802, 17820, 17832, 17982, 18027, 19728, 19782, 20178, 21678, 21780, 21783, 21798, 21978, 23958, 102564, 103845, 104769, 104895, 105264, 106254, 114528, 125406, 125604, 126054, 128052, 128205, 140256, 140526, 142857 ]
[ "nonn", "base" ]
A254476
[ 512, 2696, 12260, 47140, 170504, 586508, 1964388, 6462708, 21003228, 67662328, 216533720, 689480684, 2187191068, 6918332408, 21836278536, 68808353156, 216551437648, 680873827704, 2139217784216, 6717384585616, 21084279168188 ]
[ "nonn" ]
A316688
[ 4, 3, 8, 9, 21, 42, 81, 165, 330, 657, 1317, 2634, 5265, 10533, 21066, 42129, 84261, 168522, 337041, 674085, 1348170, 2696337, 5392677, 10785354, 21570705, 43141413, 86282826, 172565649, 345131301, 690262602, 1380525201, 2761050405, 5522100810 ]
[ "nonn" ]
A134997
[ 2, 1, 2, 2, 1, 14, 40, 52, 228, 482, 1592, 4758, 15810, 53202, 197429, 725196 ]
[ "nonn", "base", "more" ]
A060949
[ 2049, 2145, 2193, 2289, 2313, 2409, 2457, 2553, 2565, 2661, 2709, 2805, 2829, 2925, 2973, 3069, 3075, 3171, 3219, 3315, 3339, 3435, 3483, 3579, 3591, 3687, 3735, 3831, 3855, 3951, 3999, 4095, 177148, 178120, 179092, 179416, 180388 ]
[ "nonn", "base" ]
A270842
[ 1, 396, 123786, 9002912, 254721400, 3920311044, 39571426713, 293231076608, 1715840171595, 8333541708700, 34810892718492, 128392921513440, 426551317876970, 1296405100924948, 3649123762524675, 9607693522053120, 23853550135649476, 56222046462953780 ]
[ "nonn", "easy" ]
A330637
[ 1, 2, 6, 25, 106, 436, 1795, 7487 ]
[ "nonn", "more", "hard" ]
A306454
[ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 25, 1, 1, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 169, 1, 1, 1, 1, 1, 1, 25, 1, 1, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 25, 1, ...
[ "nonn" ]
A053725
[ 1, 3, 57, 1233, 75393, 19109889, 6326835201, 6388287561729, 23576681450405890, 120906321631678700000, 1.968421511613895e+24, 1.110555050367064e+29, 8.965464105556083e+33 ]
[ "nonn" ]
A332832
[ 12, 20, 24, 28, 36, 40, 44, 45, 48, 52, 56, 60, 63, 68, 72, 76, 80, 84, 88, 90, 92, 96, 99, 100, 104, 108, 112, 116, 117, 120, 124, 126, 132, 135, 136, 140, 144, 148, 152, 153, 156, 160, 164, 165, 168, 171, 172, 175, 176...
[ "nonn" ]
A381954
[ 0, 1, 1, 0, 1, 1, 1, 3, 2, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 0, 1, 1, 1, 1, 5, 1, 1, 1, 0, 1, 1, 1, 3, 1, 1, 1, 1, 2, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 3, 1, 1, 1, 1, 1, 1, 2, 0...
[ "nonn", "easy" ]
A115027
[ 1, 2, 14, 58, 174, 402, 838, 1498, 2566, 4082, 6214, 8986, 12790, 17490 ]
[ "dead" ]
A294452
[ 0, 1, 4, 16, 64, 256, 1024, 4096, 16320, 64512, 252416, 976896, 3740928, 14186496, 53330944, 198946816, 737156096, 2715254784, 9949593600, 36292198400, 131845099520, 477257695232, 1722054197248, 6195670220800, 22233100238848, 79595401641984, 284344067424256, 101...
[ "nonn", "easy" ]
A318841
[ 0, 1, 1, 3, 1, 4, 1, 7, 7, 6, 1, 10, 1, 8, 7, 15, 1, 16, 1, 16, 9, 12, 1, 22, 21, 14, 25, 22, 1, 22, 1, 31, 13, 18, 11, 34, 1, 20, 15, 36, 1, 30, 1, 34, 37, 24, 1, 46, 43, 46, 19, 40, 1, 52, 15, 50, 21, ...
[ "nonn", "easy" ]
A336118
[ 0, 0, 0, 0, 1, 0, 1, 0, 0, 1, 3, 0, 3, 1, 1, 0, 2, 0, 4, 1, 1, 3, 5, 0, 2, 3, 0, 1, 5, 1, 3, 0, 3, 2, 2, 0, 7, 4, 3, 1, 5, 1, 7, 3, 1, 5, 7, 0, 2, 2, 2, 3, 7, 0, 4, 1, 4, 5, 9, 1, 7, 3, 1, 0...
[ "nonn" ]
A161365
[ 9, 9, 19, 19, 29, 29, 39, 39, 49, 49, 59, 59, 69, 69, 79, 79, 89, 89, 99, 99, 109, 109, 119, 119, 129, 129, 139, 139, 149, 149, 159, 159, 169, 169, 179, 179, 189, 189, 199, 199, 209, 209, 219, 219, 229, 229, 239, 239, 24...
[ "nonn", "easy" ]
A363775
[ 1, -3, 6, -10, 12, -9, -2, 24, -54, 80, -84, 42, 66, -234, 420, -536, 450, -39, -740, 1770, -2688, 2898, -1722, -1320, 6078, -11349, 14736, -12992, 3084, 15999, -41212, 64032, -70788, 46020, 20778, -126132, 244120, -323421, 295410, -96848...
[ "sign", "easy" ]
A306839
[ 2, 40, 6960, 10340736, 129599358720, 13527918439695360 ]
[ "nonn", "more", "hard" ]
A065294
[ 2, 3, 4, 7, 8, 10, 14, 15, 16, 17, 19, 22, 23, 25, 32, 33, 37, 43, 44, 46, 47, 51, 55, 57, 59, 64, 67, 68, 69, 76, 79, 82, 85, 87, 88, 89, 92, 93, 94, 95, 99, 101, 102, 109, 110, 113, 114, 115, 116, 119, 122, 125, ...
[ "nonn" ]
A326804
[ 1, 1, 4, 12, 33, 91, 249, 677, 1842, 5007, 13613, 37004, 100587, 273426, 743250, 2020363, 5491918, 14928581, 40580092, 110308128, 299848580, 815072948, 2215597985, 6022619743, 16371177808, 44501475147, 120967551231, 328823896346, 893836022201, 2429698216773,...
[ "nonn" ]
A374647
[ 1, 1, 2, 3, 12, 20, 30, 210, 336, 504, 5040, 7920, 11880, 154440, 240240, 360360, 5765760, 8910720, 13366080, 253955520, 390700800, 586051200, 12893126400, 19769460480, 29654190720, 741354768000, 1133836704000, 1700755056000, 47621141568000, 72684900288000 ]
[ "nonn" ]
A056698
[ 1, 15, 41, 83, 95, 341, 551, 669, 989, 1223, 6923, 103703 ]
[ "nonn", "hard", "more" ]
A252076
[ 0, 486, 701100, 1010986002, 1457841114072, 2102205875506110, 3031379414638697000, 4.3712470137031256e+21, 6.303335162380492e+24, 9.089404932905656e+27, 1.3106915609914793e+31, 1.89001632200922e+34 ]
[ "nonn", "easy" ]
A192785
[ 1, 1, 2, 5, 11, 29, 75, 203, 557, 1561, 4427, 12706, 36819, 107576, 316579, 937471, 2791487, 8352973, 25104573, 75749240, 229379444, 696851166, 2123304184, 6487295518, 19870096689, 61001089214, 187673207413, 578532522637, 1786712575547 ]
[ "nonn" ]
A136033
[ 2, 4, 6, 16, 12, 18, 24, 40, 54, 36, 102, 110, 60, 72, 108, 140, 120, 156, 144, 200, 216, 210, 240, 180, 456, 288, 336, 300, 396, 480, 882, 360, 468, 700 ]
[ "nonn", "more", "hard" ]
A128249
[ 1, 3, 1, 16, 7, 1, 127, 139, 15, 1, 1363, 5711, 1000, 31, 1, 18628, 408354, 189035, 6631, 63, 1, 311250, 45605881, 79278446, 5470431, 42196, 127, 1, 6173791, 7390305396, 63263422646, 12703473581, 147606627, 262459, 255, 1, 142190703, 16474704...
[ "nonn", "tabl" ]
A041118
[ 8, 33, 536, 2177, 35368, 143649, 2333752, 9478657, 153992264, 625447713, 10161155672, 41270070401, 670482282088, 2723199198753, 44241669462136, 179689877047297, 2919279702218888, 11856808685922848, 192628218676984480, 782369683393860700, 12710543152978756000 ]
[ "nonn", "cofr", "frac", "easy" ]
A215720
[ 1, 0, 2, 6, 60, 560, 7350, 111552, 2009672, 41378976, 963527850, 25009038560, 716437784172, 22453784964624, 764345507271710, 28085186967504240, 1107971902218683300, 46710909213378896000, 2.0958839523688634e+21, 9.972428156744632e+22, 5.015524096516005e+24 ]
[ "nonn" ]
A045361
[ 2, 5, 11, 13, 19, 23, 37, 41, 47, 53, 61, 67, 79, 83, 89, 97, 103, 107, 109, 131, 137, 139, 149, 151, 163, 167, 173, 179, 181, 191, 193, 223, 229, 233, 251, 257, 263, 271, 277, 293, 307, 313, 317, 331, 347, 349 ]
[ "nonn", "easy" ]
A373695
[ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 9, 0, 0, 144, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4392, 0, 0, 1...
[ "nonn" ]