id
stringlengths
7
11
seq
listlengths
1
347
keywords
listlengths
1
8
A311010
[ 1, 4, 8, 10, 18, 20, 22, 29, 30, 37, 38, 40, 54, 50, 52, 62, 60, 70, 68, 70, 90, 80, 82, 95, 90, 103, 98, 100, 126, 110, 112, 128, 120, 136, 128, 130, 162, 140, 142, 161, 150, 169, 158, 160, 198, 170, 172, 194, 180, 20...
[ "nonn" ]
A076692
[ 2, 4, 18, 22, 34, 48, 66, 85, 114, 181, 263, 378, 503, 564, 690, 793, 1058, 1498, 1617, 1924, 2163, 2223, 2788, 2980, 3076, 3211, 3908, 4018, 4127, 4707, 4821, 4899, 5318, 5698, 7351, 8452, 8600, 8870, 8928, 9205, 9907, 10191, 10353...
[ "easy", "nonn" ]
A356581
[ 3, 0, 4, 7, 1, 9, 7, 4, 5, 2, 2, 3, 1, 3, 9, 9, 5, 7, 0, 8, 3, 3, 9, 4, 2, 9, 5, 9, 6, 3, 7, 3, 1, 7, 6, 4, 7, 9, 6, 4, 8, 2, 8, 2, 4, 0, 1, 5, 2, 4, 0, 6, 2, 1, 5, 1, 1, 7, 5, 4, 8, 7, 3, 3...
[ "nonn", "cons" ]
A212686
[ 0, 0, 4, 8, 24, 40, 76, 112, 176, 240, 340, 440, 584, 728, 924, 1120, 1376, 1632, 1956, 2280, 2680, 3080, 3564, 4048, 4624, 5200, 5876, 6552, 7336, 8120, 9020, 9920, 10944, 11968, 13124, 14280, 15576, 16872, 18316, 19760, 21360, 22960...
[ "nonn", "easy" ]
A218927
[ 0, 0, 1, 8, 66, 501, 6469, 60428, 926743, 11902600, 240066343, 3677270225, 108748156239, 1980478458627 ]
[ "nonn", "more" ]
A046335
[ 4224, 6336, 21312, 23232, 27072, 213312, 276672, 618816, 2133312, 2177712, 2198912, 2308032, 2513152, 2536352, 2545452, 2551552, 2553552, 2572752, 2597952, 2725272, 2745472, 2747472, 2774772, 2970792, 2994992, 4099904 ]
[ "nonn", "base" ]
A040487
[ 22, 1, 1, 2, 1, 1, 44, 1, 1, 2, 1, 1, 44, 1, 1, 2, 1, 1, 44, 1, 1, 2, 1, 1, 44, 1, 1, 2, 1, 1, 44, 1, 1, 2, 1, 1, 44, 1, 1, 2, 1, 1, 44, 1, 1, 2, 1, 1, 44, 1, 1, 2, 1, 1, 44, 1, 1, 2, 1, 1, 44, ...
[ "nonn", "cofr", "easy", "less" ]
A296216
[ 3, 6, 6, 7, 7, 5, 9, 7, 1, 7, 2, 4, 6, 5, 8, 5, 5, 2, 4, 6, 7, 0, 1, 8, 7, 1, 3, 2, 7, 2, 4, 2, 0, 8, 5, 4, 4, 0, 7, 4, 0, 1, 0, 7, 4, 6, 0, 9, 5, 0, 2, 0, 6, 5, 5, 6, 3, 7, 5, 6, 4, 7, 4, 5...
[ "nonn", "easy", "cons" ]
A334384
[ 1, 2, 4, 3, 6, 12, 5, 10, 20, 7, 14, 28, 8, 16, 32, 9, 15, 25, 11, 22, 44, 13, 26, 52, 17, 34, 68, 18, 30, 50, 19, 38, 76, 21, 42, 84, 23, 46, 92, 24, 36, 54, 27, 45, 75, 29, 58, 116, 31, 62, 124, 33, 66, 132, ...
[ "nonn", "look", "tabf" ]
A318184
[ 1, 1, 72, 186624, 13604889600, 24679069470425090, 1.0367157836903921e+24, 9.624596067967489e+32, 1.9112837387997045e+43, 7.926475921550135e+54, 6.740687095714756e+67 ]
[ "nonn" ]
A038294
[ 1, 9, 4, 81, 72, 16, 729, 972, 432, 64, 6561, 11664, 7776, 2304, 256, 59049, 131220, 116640, 51840, 11520, 1024, 531441, 1417176, 1574640, 933120, 311040, 55296, 4096, 4782969, 14880348, 19840464, 14696640, 6531840, 1741824, 258048 ]
[ "nonn", "tabl", "easy" ]
A240456
[ 4, 21, 102, 476, 2200, 10123, 46471, 213000, 975380, 4464474, 20429739, 93474260, 427645941, 1956395954, 8949898045, 40942368765, 187294120155, 856787747966, 3919414321141, 17929510264717, 82019155503670, 375199231601451 ]
[ "nonn" ]
A187396
[ 1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 13, 15, 16, 17, 18, 19, 20, 22, 23, 24, 25, 26, 27, 29, 30, 31, 32, 33, 34, 36, 37, 38, 39, 40, 41, 43, 44, 45, 46, 47, 48, 49, 51, 52, 53, 54, 55, 56, 58, 59, 60, 61, 62, ...
[ "nonn" ]
A125709
[ 1, 5, 32, 444, 13375, 684215, 52267513 ]
[ "nonn", "more" ]
A311192
[ 1, 4, 8, 12, 16, 20, 25, 30, 33, 36, 40, 45, 51, 57, 62, 65, 67, 69, 73, 78, 82, 86, 90, 95, 100, 105, 110, 114, 118, 122, 127, 131, 133, 135, 138, 143, 149, 155, 160, 164, 167, 170, 175, 180, 184, 188, 192, 196, 200, ...
[ "nonn" ]
A359097
[ 1, 25, 304, 3909, 58299, 907721 ]
[ "nonn", "base", "more" ]
A151375
[ 1, 1, 1, 1, 3, 6, 10, 15, 49, 112, 216, 375, 1265, 3069, 6357, 11921, 40845, 102528, 221680, 436203, 1507593, 3869027, 8609811, 17511879, 60844223, 158598846, 360334950, 750899305, 2617859439, 6903200862, 15932387546, 33824479875, 118192674861, 31446...
[ "nonn", "walk" ]
A091059
[ 1, 1, 5, 18, 173, 2812, 126446, 16821330, 7343033248, 10733521835504, 52867612881649880, 882178115128903900000, 5.022799732225948e+25, 9.837048598740464e+30, 6.681839615514161e+36, 1.5867777966020616e+43 ]
[ "nonn" ]
A151642
[ 0, 1, 13840, 4961755, 733059110, 75073622025, 6438673851876, 503519287150295, 37463016470769170, 2712124797724710400, 193396524783642740000, 1.3675857973300538e+22, 9.626243318557629e+23, 6.75863998046563e+25, 4.7387243824514626e+27 ]
[ "nonn" ]
A354843
[ 1, 5, 19, 145, 601, 8521, 35281, 672001, 4898881, 82615681, 439084801, 21138606721, 80951270401, 3358578263041, 49506372115201, 1227603183206401, 6046686277632001, 611515751899852800, 2311256907767808000, 254421414038266680000, 4.0157784659714643e+21 ]
[ "nonn" ]
A159647
[ 1, 18, -398, -33156, 265260, 100529208, 851937144, -420157660464, -11868528214128, 2213197138985760, 116959244837147420, -13874016936408533000, -1.1786226273519784e+21, 9.898927544470793e+22, 1.2844358938330412e+25, -7.693851353051602e+26 ]
[ "sign", "frac" ]
A009276
[ 1, 1, -1, -4, 9, 52, -175, -1370, 5985, 60216, -320063, -3929550, 24549745, 354693796, -2543955167, -42233123938, 341610526145, 6404634620016, -57626692351871, -1203767371104790, 11918048043239376, 274395314816604640 ]
[ "sign", "easy" ]
A354301
[ 0, 7, 12, 262, 12887667 ]
[ "nonn", "base", "more" ]
A112588
[ 7, 11, 13, 17, 19, 21, 22, 23, 25, 26, 27, 29, 31, 32, 33, 34, 35, 37, 38, 39, 41, 43, 44, 45, 46, 47, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 73, 74, 75, 76, 77, ...
[ "nonn" ]
A020091
[ 1, 1, 2, 6, 21, 99, 584, 4039, 31971, 285070, 2826942, 30860774, 367757554, 4750201728, 66106974038, 986095696056, 15695356495548, 265513114049684, 4757109960056837, 89988663411075170, 1792274212937247000 ]
[ "nonn" ]
A223787
[ 148, 21904, 1455816, 61333566, 2226551034, 82093381460, 3219192158949, 131884144499255, 5492364938094602, 229040827160337250, 9528541541617113000, 395783235818312430000, 1.6434316529261926e+22, 6.825647375639074e+23 ]
[ "nonn" ]
A347738
[ 0, 1, 1, 0, 4, 3, 2, 2, 1, 0, 10, 8, 6, 5, 5, 5, 3, 2, 2, 1, 1, 0, 22, 19, 15, 12, 11, 11, 9, 9, 10, 10, 9, 6, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 0, 46, 42, 35, 28, 24, 23, 21, 20, 21, 21, 19, 17, 16, ...
[ "nonn", "tabf", "nice", "look" ]
A193243
[ 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0...
[ "nonn" ]
A249126
[ 6, 837, 85094, 8537238, 853922530, 85397212652, 8539729843352, 853973398759468, 85397341863406220, 8539734219628210000, 853973422224398700000, 8.53973422261853e+22, 8.539734222671269e+24, 8.539734222673171e+26, 8.539734222673542e+28 ]
[ "nonn", "base" ]
A107428
[ 1, 2, 4, 6, 11, 21, 39, 71, 141, 276, 542, 1070, 2110, 4189, 8351, 16618, 33134, 66129, 131937, 263483, 526453, 1051984, 2102582, 4203177, 8403116, 16800894, 33593742, 67174863, 134328816, 268624026, 537192064, 1074288649, 2148414285, 4296543181, 8...
[ "nonn" ]
A026379
[ 1, 7, 39, 202, 1015, 5028, 24731, 121208, 593019, 2899335, 14173401, 69301422, 338990145, 1659037695, 8124085575, 39806373880, 195160896835, 957396540285, 4699409632805, 23080158080150, 113414575414245, 557601196738190 ]
[ "nonn", "nice", "easy" ]
A217074
[ 6, 40, 65, 70, 114, 151, 221, 229, 268, 283, 398, 451, 460, 519, 554, 587, 627, 628, 659, 687, 699, 859, 884, 915, 943, 974, 986, 1101, 1120, 1159, 1176, 1212, 1223, 1297, 1312, 1322, 1337, 1390, 1409, 1415, 1446, 1477, 1508, 1592...
[ "nonn", "easy" ]
A348222
[ 1, 1, 3, 12, 72, 856, 17018, 531568 ]
[ "nonn", "more" ]
A038021
[ 1, 0, 1, 1, 2, 1, 38, 57, 27, 7, 13872, 18544, 9280, 2080, 192, 83360520, 104208775, 52110500, 13035000, 1632750, 82355 ]
[ "nonn", "tabl", "more" ]
A147297
[ 31, 307, 463, 1123, 1723, 3307, 4831, 6007, 8011, 10303, 11131, 13807, 20023, 23563, 26083, 30103, 35911, 43891, 60271, 86143, 95791, 108571, 127807, 136531, 145543, 164431, 205663, 239611, 276151, 284623, 288907, 366631, 371491, 386263, 459007 ]
[ "nonn" ]
A054006
[ 4, 8, 8, 8, 8, 8, 16, 16, 16, 8, 16, 16, 16, 16, 16, 16, 16, 16, 32, 16, 16, 16, 16, 32, 16, 16, 16, 24, 16, 16, 16, 32, 32, 32, 16, 16, 32, 16, 32, 16, 16, 32, 32, 16, 32, 16, 16, 16, 16, 16, 32, 32, 16, 32, ...
[ "nonn" ]
A294142
[ 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 1, 0, 2, 0, 3, 1, 2, 2, 3, 0, 4, 4, 4, 2, 6, 1, 6, 8, 4, 10, 12, 4, 12, 5, 7, 17, 17, 8, 14, 24, 9, 29, 24, 4, 33, 40, 25, 29, 28, 23, 45, 63, 23, 30, 52, 37, 84, ...
[ "nonn" ]
A357224
[ 1, 1, 5, 38, 315, 2855, 27325, 272030, 2788042, 29221793, 311767823, 3374650902, 36968040004, 409076635878, 4565873250981, 51342245169913, 581093383193700, 6614534942714496, 75675364150733070, 869713202188274400, 10036085000519703000, 116238137830534600000 ]
[ "nonn" ]
A310602
[ 1, 4, 6, 14, 14, 18, 28, 24, 36, 32, 44, 46, 48, 56, 56, 66, 64, 70, 76, 76, 88, 86, 90, 96, 96, 112, 102, 118, 114, 120, 128, 126, 138, 130, 146, 148, 150, 152, 156, 166, 168, 172, 176, 176, 184, 188, 196, 192, 200, 2...
[ "nonn" ]
A214448
[ 1, 2, 2, 3, 4, 6, 9, 15, 25, 44, 80, 148, 281, 544, 1070, 2139, 4343, 8946, 18676, 39495, 84545, 183102, 400981, 887517, 1984548, 4481308, 10215173, 23498233, 54529901, 127618907, 301130984, 716214216 ]
[ "nonn", "easy" ]
A034771
[ 1, 4, 6, 15, 18, 48, 66, 154, 267, 552, 1026, 2154, 4098, 8328, 16428, 33061, 65538, 131676, 262146, 525390, 1048716, 2099208, 4194306, 8393124, 16777251, 33562632, 67109392, 134234334, 268435458, 536904864, 1073741826, 2147549616 ]
[ "nonn" ]
A297818
[ 1, 17, 48, 146, 399, 1114, 3124, 8861, 25130, 71196, 201467, 570100, 1613454, 4566805, 12926144, 36586306, 103553095, 293094410, 829569532, 2348002541, 6645755138, 18810052924, 53239705819, 150688904948, 426507740022 ]
[ "nonn" ]
A135905
[ 1, 4, 24, 186, 1736, 18754, 228658, 3092316, 45802294, 735881882, 12727541778, 235515880084, 4638914346322, 96840935881898, 2134717733185118, 49529467079270060, 1206148832249660000, 30751284267472230000 ]
[ "nonn" ]
A056244
[ 0, 1, 3, 5, 93, 159, 359, 1469, 2897, 3093, 3111, 15697, 17955, 42261, 111031 ]
[ "nonn", "hard", "more" ]
A225017
[ 1, 1, 7, 1, 13, 11, 19, 23, 1, 13, 1, 19, 7, 23, 17, 11, 29, 7, 1, 59, 61, 31, 67, 37, 41, 77, 79, 89, 17, 83, 91, 13, 53, 89, 103, 23, 109, 13, 31, 67, 13, 137, 29, 149, 151, 29, 7, 1, 29, 79, 151, 19, 13, 119...
[ "nonn", "base" ]
A292617
[ 1, 2, 4, 10, 25, 70, 209, 656, 2137, 7155, 24447, 84864, 298374, 1060151, 3800365, 13727145, 49910870, 182522747, 670896855, 2477250003, 9184502747, 34177467134, 127606759053, 477890336663, 1794697782990, 6757164079051, 25501212956975, 96450275088260 ]
[ "nonn" ]
A184968
[ 5, 11, 17, 41, 85, 137, 257, 641, 1285, 2329, 4369, 10537, 17477, 35209, 65537, 163841, 297109, 557057, 1114129, 2687017, 4491589, 8978569, 16843009, 42009217, 71304257, 143163649, 286331153, 690563369, 1145390149, 2281701377, 4295098369, 10737647617 ]
[ "nonn" ]
A299783
[ 1, 0, 0, 2, 4, 32, 32, 96 ]
[ "nonn", "more", "hard" ]
A155547
[ 2, 7, 13, 19, 23, 29, 31, 43, 53, 61, 67, 173, 179, 193, 199, 223, 227, 281, 283, 311, 317, 337, 347, 409, 419, 433, 443, 457, 461, 463, 467, 491, 503, 521, 523, 541, 547, 569, 577, 593, 599, 601, 607, 619, 641, 647, 653, ...
[ "nonn", "base" ]
A142382
[ 31, 313, 877, 971, 1723, 2099, 2287, 2381, 2663, 2851, 3697, 4073, 4261, 4637, 4919, 5107, 5483, 5953, 6047, 6329, 7457, 7927, 8209, 8867, 9337, 9431, 9619, 9901, 10559, 11311, 11593, 11969, 12157, 12251, 12721, 13003, 13567, 15259, 15541, ...
[ "nonn", "easy" ]
A032393
[ 2, 6, 8, 18, 26, 56, 78, 86, 104, 134, 207, 518, 602, 1268, 1302, 2324, 2372, 4574, 5652, 5966, 6146, 6378, 7502, 7682, 7895, 9198, 9344, 11106, 11504, 12096, 19904, 19932, 20816, 43406, 57222, 61202, 83766, 98978, 121562, 177078, 18745...
[ "nonn" ]
A219814
[ 21, 66, 795, 7049, 57848, 510090, 4734774, 43171729, 376434884, 3124298256, 24853892199, 190903317068, 1420264620170, 10242847733797 ]
[ "nonn" ]
A180451
[ 3, 19, 29, 41, 101, 109, 127, 281, 293, 353, 509, 523, 743, 821, 853, 919, 1019, 1193, 1229, 1283, 1301, 2503, 2683, 2797, 2843, 3221, 3637, 3863, 4093, 4327, 4889, 4943, 5897, 6451, 6481, 6659, 6689, 6719, 6779, 6869, 6899, 7541, 7...
[ "easy", "nonn" ]
A161031
[ 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 2, 1, 2, 1, 2, 1, 2, 3, 3, 3, 5, 4, 5, 6, 7, 7, 9, 9, 10, 11, 12, 14, 14, 15, 16, 17, 19, 19, 22, 23, 25, 28, 29, 32, 35, 38, 41, 44, 47, 51, 55, 59, 65, 68, 73, ...
[ "nonn" ]
A154312
[ 1, 0, 2, 0, 1, 3, 0, 0, 3, 5, 0, 0, 0, 7, 9, 0, 0, 0, 0, 15, 17, 0, 0, 0, 0, 0, 31, 33, 0, 0, 0, 0, 0, 0, 63, 65, 0, 0, 0, 0, 0, 0, 0, 127, 129, 0, 0, 0, 0, 0, 0, 0, 0, 255, 257, 0, 0, 0, 0, 0, 0,...
[ "nonn", "tabl" ]
A301579
[ -1, 0, 0, 2, 0, 0, 1, 4, 1, 0, 0, 2, 0, 0, 1, 6, 1, 0, 0, 2, 0, 2, 1, 4, 1, 0, 0, 2, 0, 3, 3, 8, 1, 0, 3, 2, 0, 0, 3, 4, 1, 0, 1, 4, 0, 0, 1, 6, 3, 0, 0, 2, 1, 0, 1, 4, 3, 0, 1, 5, 0, 5, 1, ...
[ "sign" ]
A326693
[ 0, 1, 2, 3, 4, 3, 4, 5, 6, 6, 5, 4, 3, 4, 3, 2, 1, 0, 0, 0, 1, 2, 2, 1, 0, 1, 1, 0, 0, 0, 1, 1, 0, 1, 2, 2, 1, 0, 0, 0, 1, 2, 3, 4, 3, 4, 5, 6, 6, 5, 4, 3, 4, 3, 2, 1, 0, 0, 0, 1, 1, 0, 1, 1...
[ "nonn" ]
A157591
[ 1, 3, 354, 35410, 3079815, 254391501, 20017977868, 1645049437956, 130713839323245, 9274041450918256, 602446992143570600, 36862449524697506000, 2.1611884753205508e+21, 1.2252844976974336e+23 ]
[ "nonn" ]
A354024
[ 4, 10, 12, 28, 30, 32, 36, 82, 84, 90, 96, 108, 244, 246, 252, 256, 270, 288, 324, 730, 732, 738, 756, 768, 810, 864, 972, 2188, 2190, 2196, 2214, 2268, 2304, 2430, 2592, 2916, 6562, 6564, 6570, 6588, 6642, 6804, 6912, 7290, 777...
[ "easy", "nonn" ]
A040881
[ 30, 5, 60, 5, 60, 5, 60, 5, 60, 5, 60, 5, 60, 5, 60, 5, 60, 5, 60, 5, 60, 5, 60, 5, 60, 5, 60, 5, 60, 5, 60, 5, 60, 5, 60, 5, 60, 5, 60, 5, 60, 5, 60, 5, 60, 5, 60, 5, 60, 5, 60, 5, 60, 5, 60, 5, 60, 5,...
[ "nonn", "cofr", "easy" ]
A311013
[ 1, 4, 8, 11, 12, 12, 14, 18, 22, 26, 30, 36, 42, 44, 42, 38, 38, 45, 54, 60, 62, 64, 70, 75, 74, 68, 64, 68, 78, 88, 94, 98, 102, 106, 106, 100, 94, 95, 104, 116, 124, 128, 132, 135, 136, 132, 126, 124, 128, 138 ]
[ "nonn" ]
A156060
[ 0, 1, 1, 3, 5, 2, 3, 7, 4, 0, 8, 8, 6, 4, 7, 6, 2, 5, 0, 1, 1, 3, 5, 2, 3, 7, 4, 0, 8, 8, 6, 4, 7, 6, 2, 5, 0, 1, 1, 3, 5, 2, 3, 7, 4, 0, 8, 8, 6, 4, 7, 6, 2, 5, 0, 1, 1, 3, 5, 2, 3, 7, 4, 0...
[ "nonn", "easy" ]
A050328
[ 1, 1, 1, 1, 1, 3, 1, 1, 1, 3, 1, 5, 1, 3, 3, 1, 1, 5, 1, 5, 3, 3, 1, 7, 1, 3, 1, 5, 1, 13, 1, 1, 3, 3, 3, 13, 1, 3, 3, 7, 1, 13, 1, 5, 5, 3, 1, 9, 1, 5, 3, 5, 1, 7, 3, 7, 3, 3, 1, 31, 1, 3, 5,...
[ "nonn" ]
A000778
[ 1, 2, 6, 18, 55, 173, 560, 1858, 6291, 21657, 75581, 266797, 950911, 3417339, 12369284, 45052514, 165002459, 607283489, 2244901889, 8331383609, 31030387439, 115948830659, 434542177289, 1632963760973, 6151850548775, 23229299473603, 87900903988155 ]
[ "nonn" ]
A296930
[ 5, 19, 29, 37, 41, 43, 47, 59, 61, 67, 73, 83, 97, 103, 109, 113, 127, 151, 173, 179, 181, 191, 193, 197, 223, 233, 239, 241, 251, 263, 269, 271, 277, 307, 313, 317, 331, 337, 359, 383, 397, 401, 443, 449, 463, 467, 491, 5...
[ "nonn", "easy" ]
A175490
[ 1, 2, 3, 8, 20, 144, 63, 256, 1152, 1600, 118800, 995328, 8424000, 12192768, 178605, 1048576, 8912896, 21233664, 27572576256, 13107200000, 537600000, 2032335360000, 30928035600000, 760840571584512, 13541327555788800 ]
[ "base", "nonn" ]
A281237
[ 32, 96, 544, 3168, 18464, 107616, 627232, 3655776, 21307424, 124188768, 723825184, 4218762336, 24588748832, 143313730656, 835293635104, 4868448079968, 28375394844704, 165383920988256, 963928131084832, 5618184865520736, 32745181062039584, 190852901506716770 ]
[ "nonn", "easy" ]
A272114
[ 7, -3, 39, -27, 91, -75, 175, -151, 271, -243, 415, -403, 551, -499, 771, -759, 939, -843, 1211, -1291, 1531, -1419, 1831, -1799, 2039, -1859, 2407, -2523, 2815, -2611, 3175, -3147, 3459, -3291, 4027, -4119, 4495, -4195, 4931, -4967, 53...
[ "sign", "easy" ]
A053907
[ 1, 16, 676, 17161, 76176, 776161, 11771761, 6617171716, 6661661161, 16671716161, 17676766116, 1671671667166667800 ]
[ "nonn", "base", "more" ]
A062807
[ 0, 1, 4, 14, 50, 187, 738, 3084, 13652, 63917, 315736, 1641314, 8956110, 51175799, 305527878, 1901829488, 12319405728, 82896050937, 578485474092, 4180313933206, 31237475311690, 241063266361235, 1918899090047882 ]
[ "nonn", "easy" ]
A227948
[ 21, 23, 27, 29, 81, 83, 253, 293, 299, 343, 347, 349, 431, 437, 439, 471, 473, 477, 529, 623, 653, 659, 677, 743, 893, 1123, 1219, 1253, 1257, 1297, 1423, 1489, 1521, 1523, 1529, 1587, 1589, 1657, 1763, 1853, 1867, 1927, 2151, 216...
[ "nonn", "base", "easy" ]
A341331
[ 1, 3, 18, 158, 1825, 26141, 446782, 8869820, 200535993, 5085658075, 142947350986, 4410243535402, 148156328308105, 5382924338773177, 210309307208574750, 8791961076113492000, 391581231268402950000, 1.851037790567563e+22, 9.255552623597256e+23 ]
[ "nonn", "easy" ]
A237195
[ 1, 2, 7, 52, 846, 28628, 1928768, 255610528, 66822534992, 34632302913632, 35711543058158590, 73426371674544520000, 3.0141945195841168e+23, 2.4722525356170961e+27, 4.0532629372281642e+31, 1.3286600582587326e+36 ]
[ "nonn" ]
A072272
[ 1, 5, 5, 17, 5, 25, 17, 61, 5, 25, 25, 85, 17, 85, 61, 217, 5, 25, 25, 85, 25, 125, 85, 305, 17, 85, 85, 289, 61, 305, 217, 773, 5, 25, 25, 85, 25, 125, 85, 305, 25, 125, 125, 425, 85, 425, 305, 1085, 17, 85, 85, 2...
[ "nonn", "nice" ]
A036799
[ 0, 2, 10, 34, 98, 258, 642, 1538, 3586, 8194, 18434, 40962, 90114, 196610, 425986, 917506, 1966082, 4194306, 8912898, 18874370, 39845890, 83886082, 176160770, 369098754, 771751938, 1610612738, 3355443202, 6979321858, 14495514626, 30064771074, 62277025794 ]
[ "nonn", "easy" ]
A265425
[ 3, 5, 17, 65, 4097, 65537, 262145, 1073741825 ]
[ "nonn", "more" ]
A349607
[ 1, 2, 3, 4, 6, 8, 9, 10, 12, 16, 18, 20, 24, 30, 32, 36, 40, 48, 60, 72, 80, 90, 96, 120, 144, 160, 180, 192, 216, 224, 240, 288, 320, 360, 384, 432, 448, 480, 576, 640, 720, 768, 864, 896, 960, 1152, 1280, 1344, 1440, ...
[ "nonn" ]
A157041
[ 3, 6, 7, 8, 12, 15, 16, 17, 19, 22, 25, 26, 27, 31, 34, 35, 36, 38, 39, 40, 42, 43, 44, 47, 50, 53, 54, 55, 59, 62, 63, 64, 66, 69, 72, 73, 74, 78, 81, 82, 83, 85, 86, 87, 89, 90, 91, 94, 95, 96, 98, 101, 104, ...
[ "nonn" ]
A064674
[ 0, 2, 2, 3, 6, 12, 23, 46, 94, 198, 424, 854, 1859, 3884, 8362, 17837, 38977, 84188, 183167, 398685, 874078 ]
[ "nonn", "more" ]
A200443
[ 1, 1, 2, 1, 3, 2, 1, 4, 3, 2, 1, 5, 4, 3, 2, 1, 6, 5, 4, 3, 2, 1, 7, 6, 5, 4, 3, 2, 1, 8, 9, 6, 5, 4, 3, 2, 1, 9, 12, 9, 6, 5, 4, 3, 2, 1, 10, 15, 14, 9, 6, 5, 4, 3, 2, 1, 11, 18, 19, 12, 7, 6, ...
[ "nonn", "tabl" ]
A145831
[ 0, 4, 0, 8, 9, 8 ]
[ "more", "nonn" ]
A124083
[ 1, 2, 3, 60, 90 ]
[ "nonn", "more" ]
A335931
[ 1, 2, 1, 6, 0, 0, 6, 7, 2, 3, 4, 2, 4, 9, 7, 9, 7, 8, 0, 3, 1, 2, 5, 9, 2, 7, 2, 3, 2, 8, 0, 8, 5, 4, 7, 0, 5, 6, 4, 0, 3, 0, 7, 6, 3, 2, 1, 6, 4, 3, 8, 3, 4, 6, 0, 0, 5, 8, 3, 6, 3, 1, 6, 9...
[ "nonn", "cons" ]
A236333
[ 1, 3, 2, 4, 4, 2, 9, 5, 2, 16, 6, 2, 25, 7, 2, 36, 8, 2, 49, 9, 2, 64, 10, 2, 81, 11, 2, 100, 12, 2, 121, 13, 2, 144, 14, 2, 169, 15, 2, 196, 16, 2, 225, 17, 2, 256, 18, 2, 289, 19, 2, 324, 20, 2, 361, 21, ...
[ "nonn", "easy" ]
A293264
[ 1, -2, -2, -5, -29, -232, -2231, -24745, -308917, -4279945, -65179552, -1082598411, -19480497765, -377583928402, -7844313743160, -173920273954426, -4099686000487330, -102398103973448580, -2701860620027906600, -75107104456422560000, -2.1941836612335745e+21 ]
[ "sign" ]
A077622
[ 1, 2, 7, 27, 190, 1621, 17271, 200536, 2757881, 47108763, 843069901, 17797435824 ]
[ "nonn" ]
A164277
[ 1, 44, 1892, 81356, 3498308, 150427244, 6468370546, 278139892800, 11960013642192, 514280511441312, 22114058759539824, 950904387665439000, 40888882692839514000, 1.7582216987908388e+21, 7.56035219969535e+22 ]
[ "nonn" ]
A167738
[ 29, 929, 2441, 3361, 4289, 7121, 8081, 9049, 19841, 34361, 49081, 61001, 76081, 88289, 94441, 112121, 121169, 148361, 193841, 230369, 239521, 276209, 322249, 377761, 414929, 461569, 536609, 564881, 583769, 602689, 621641, 707321, 745609 ]
[ "base", "nonn" ]
A280938
[ 1, 1, 2, 3, 5, 7, 11, 15, 20, 28, 38, 50, 67, 87, 113, 146, 187, 237, 301, 378, 473, 590, 732, 903, 1113, 1364, 1666, 2030, 2464, 2981, 3600, 4332, 5201, 6229, 7442, 8869, 10551, 12521, 14829, 17531, 20684, 24357, 28638, 33607, ...
[ "nonn" ]
A187469
[ 1, 1, 1, 1, 1, 3, 3, 3, 3, 3, 5, 4, 4, 4, 4, 7, 6, 6, 6, 6, 9, 7, 8, 8, 8, 11, 9, 9, 9, 9, 13, 10, 11, 11, 11, 15, 12, 13, 12, 12, 17, 13, 14, 14, 14, 19, 15, 16, 16, 16, 21, 16, 18, 17, 17, 23, 18, 19,...
[ "nonn", "tabf" ]
A172080
[ 0, 1, 37, 190, 590, 1415, 2891, 5292, 8940, 14205, 21505, 31306, 44122, 60515, 81095, 106520, 137496, 174777, 219165, 271510, 332710, 403711, 485507, 579140, 685700, 806325, 942201, 1094562, 1264690, 1453915, 1663615, 1895216, 2150192 ]
[ "nonn", "easy" ]
A319859
[ 1, 1, 2, 5, 11, 19, 33, 63, 124, 212, 350, 620, 1107, 1819, 2977, 5076, 8549, 13797, 22199, 36304, 59271, 94406, 148948, 238199, 380653, 595930, 928696, 1460474, 2288948, 3541879, 5460144, 8458886, 13084665, 20046161, 30590724, 46871521, 717112...
[ "nonn" ]
A054899
[ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6...
[ "nonn" ]
A190681
[ 0, 0, 2, 61, 899, 11219, 126905, 1374229, 14529946, 151426672, 1563147978, 16031036348 ]
[ "nonn" ]
A120913
[ 1, 3, 2, 6, 5, 4, 10, 8, 9, 7, 15, 13, 12, 14, 11, 21, 18, 17, 19, 20, 16, 28, 25, 24, 23, 26, 27, 22, 36, 32, 31, 30, 33, 34, 35, 29, 45, 41, 39, 40, 38, 42, 43, 44, 37, 55, 50, 49, 48, 47, 51, 52, 53, 54, 4...
[ "easy", "nonn", "tabl" ]
A228827
[ 1, 25, 599, 4285, 15599, 169625, 33578309, 344155, 133697983, 941417335, 1729982389, 3184334285, 274574499509, 2625798955, 1611022490371, 123951819730625, 9814145542783, 3453861186955, -25128299959971713000, 2945661954537595, -260933954573210500000 ]
[ "frac", "sign" ]
A026563
[ 1, 1, 2, 2, 7, 8, 24, 28, 93, 111, 362, 436, 1452, 1763, 5880, 7176, 24089, 29521, 99386, 122182, 412637, 508595, 1721500, 2126312, 7211536, 8923136, 30312960, 37563930, 127790379, 158563368, 540082784, 670893296, 2287577537 ]
[ "nonn" ]
A115649
[ 1, 2, 3, 4, 5, 7, 8, 11, 13, 20, 21, 31, 38, 62, 63, 65, 66, 70, 72, 102, 107, 109, 120, 125, 217, 218, 238, 240, 373, 382, 387, 427, 439, 834, 840, 890, 915, 1440, 1474, 1638, 1650, 3213, 3220, 3241, 3332, 3540, 5886, 675...
[ "nonn" ]
A169580
[ 9, 36, 49, 81, 121, 144, 169, 196, 225, 289, 324, 361, 441, 484, 529, 576, 625, 676, 729, 784, 841, 900, 961, 1089, 1156, 1225, 1296, 1369, 1444, 1521, 1681, 1764, 1849, 1936, 2025, 2116, 2209, 2304, 2401, 2500, 2601, 2704, 2809, ...
[ "nonn" ]
A221229
[ 0, 1, 1, 2, 19, 2, 4, 137, 137, 4, 8, 1033, 2710, 1033, 8, 16, 7877, 65453, 65453, 7877, 16, 32, 60223, 1516877, 4581973, 1516877, 60223, 32, 64, 460713, 35691850, 322610120, 322610120, 35691850, 460713, 64, 128, 3524857, 840634931, 23035...
[ "nonn", "tabl" ]