id
stringlengths
7
11
seq
listlengths
1
347
keywords
listlengths
1
8
A013850
[ 9, 531441, 31381059609, 1853020188851841, 109418989131512370000, 6.461081889226673e+24, 3.8152042447694586e+29, 2.252839954493917e+34, 1.3302794647291133e+39 ]
[ "nonn", "easy" ]
A303512
[ 64, 960, 9367, 222205, 5122419, 104285205, 2346396384, 53305999504, 1176790967846, 26406239839389, 594228391498452, 13296124650266098, 298383751528089400, 6701075635866431000, 150325174488061640000 ]
[ "nonn" ]
A276146
[ 0, 1, 2, 3, 1, 2, 3, 4, 5, 6, 4, 5, 2, 3, 4, 5, 3, 4, 1, 2, 3, 4, 2, 3, 4, 5, 6, 7, 5, 6, 7, 8, 9, 10, 8, 9, 6, 7, 8, 9, 7, 8, 5, 6, 7, 8, 6, 7, 3, 4, 5, 6, 4, 5, 6, 7, 8, 9, 7, 8, 5, 6, 7, ...
[ "nonn", "base" ]
A164894
[ 1, 6, 52, 840, 26896, 1721376, 220336192, 56406065280, 28879905423616, 29573023153783296, 60565551418948190000, 2.480764986120118e+23, 2.0322426766296006e+27, 3.3296264013899376e+31, 1.0910519792074547e+36 ]
[ "base", "easy", "nonn" ]
A336513
[ 1, 14, 630, 57264, 8626800, 1940869440, 609372212400, 254507088084480, 136432540607489280, 91303132805512990000, 7.4605774050426544e+22, 7.309748514003874e+25, 8.458893888843902e+28, 1.1414407036516593e+32, 1.77648727691419e+35 ]
[ "nonn", "easy" ]
A353286
[ 23, 29, 37, 41, 53, 61, 67, 73, 101, 103, 127, 137, 163, 181, 229, 241, 281, 353, 421, 433, 601, 617, 641, 821, 887, 1093, 1433, 1489, 1697, 1759, 1877, 2081, 2083, 2237, 2297, 2381, 2657, 2801, 2953, 3461, 3529, 3557, 3917, 4153,...
[ "nonn", "easy" ]
A269994
[ 2, 7, 57, 3391, 10010183, 588972486242552, 9.614571843475971e+29, 2.2442271677657357e+60 ]
[ "nonn", "frac", "easy" ]
A218998
[ 7, 163, 2265, 31857, 461681, 6639893, 95431043, 1372612359, 19740345667, 283887907827, 4082690596769, 58714522782689, 844392025770105, 12143471562419700, 174639147022394880, 2511541333793121300 ]
[ "nonn" ]
A183817
[ 32768, 26630220, 20864057480, 16607782066704, 13143529051807800, 10425296660739254000 ]
[ "nonn" ]
A354447
[ 684019, 704977, 2691451, 3242197, 3375001, 4931101, 5318677, 5772403, 8872487, 10702783, 16983854, 20616463, 24897817, 41258737, 46343059, 60698521, 66469429, 69625969, 79692193, 89576767, 95731489, 96753187, 97867441, 116773741, 119793457, 126516061, 147187369 ]
[ "nonn" ]
A222979
[ 1, 4, 43, 4572, 601407, 850056406, 1202086792105, 17754195762507496, 260868222546366370000, 3.937782897338512e+25 ]
[ "nonn" ]
A300293
[ 0, 0, 1, 1, 1, 2, 3, 3, 4, 4, 4, 5, 6, 6, 7, 7, 7, 8, 9, 9, 10, 10, 10, 11, 12, 12, 13, 13, 13, 14, 15, 15, 16, 16, 16, 17, 18, 18, 19, 19, 19, 20, 21, 21, 22, 22, 22, 23, 24, 24, 25, 25, 25, 26, 27, 27, ...
[ "nonn", "easy" ]
A068268
[ 1, 4641, 5554571857, 1714419367669298200, 1.3646176775996462e+29, 2.801124263786734e+42, 1.482795337783862e+58, 2.0242190237452648e+76 ]
[ "nonn" ]
A227709
[ 159, 906, 5664, 34932, 206652, 1168620, 6344268, 33264780, 169424652, 842319372, 4104041484, 19659270156, 92822679564, 432877854732, 1997218529292, 9129086189580, 41386604691468, 186264812126220, 832881548328972, 3702608701685772, 16373934411743244 ]
[ "nonn", "easy" ]
A216049
[ 6, 10, 22, 34, 74, 106, 178, 142, 202, 358, 274, 386, 466, 514, 502, 802, 622, 746, 694, 914, 1322, 958, 1094, 1198, 1234, 1282, 1366, 1814, 1762, 1546, 1654, 1618, 1882, 2066, 1954, 2578, 2402, 2374, 2458, 2446, 2554, 2722, 3194, ...
[ "nonn" ]
A306568
[ 3, 4, 8, 2, 11, 15, 3, 11, 20, 24, 1, 10, 22, 31, 35, 0, 4, 23, 35, 44, 48, 0, 4, 19, 38, 50, 59, 63, 1, 3, 15, 36, 55, 67, 76, 80, 1, 2, 6, 34, 55, 74, 86, 95, 99, 0, 2, 4, 27, 55, 76, 95, 107, 116, 120, 0...
[ "nonn", "tabl" ]
A093582
[ 4, 7, 7, 4, 6, 4, 8, 2, 9, 2, 7, 5, 6, 8, 6, 0, 0, 7, 3, 0, 6, 6, 5, 1, 2, 9, 0, 1, 1, 7, 5, 4, 3, 0, 8, 6, 1, 0, 3, 3, 7, 8, 9, 3, 7, 2, 2, 1, 3, 6, 9, 3, 4, 6, 2, 4, 3, 0, 0, 2, 0, 3, 2, 1...
[ "nonn", "cons" ]
A294583
[ 1, 1, -1, 1, -1, -1, 1, -1, -4, 0, 1, -1, -16, -5, 0, 1, -1, -64, -65, -3, 1, 1, -1, -256, -665, -79, 23, 0, 1, -1, -1024, -6305, -1575, 831, 44, 1, 1, -1, -4096, -58025, -28255, 33335, 4789, 104, 0, 1, -1, -16384, -5273...
[ "sign", "tabl" ]
A326494
[ 1, 2, 4, 6, 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, 63, 65, 67, 69, 71, 73, 75, 77, 79, 81, 83, 85, 87, 89, 91, 93, 95, 97, 99, 101, 103, 105, ...
[ "nonn" ]
A111016
[ 2, 13, 3457, 17797573, 1.0556393043837552e+32, 5.48910881501677e+35, 3.0150614379007816e+91 ]
[ "easy", "nonn" ]
A106456
[ 0, 10, 1010, 1100, 110010, 101100, 101010, 110100, 10110010, 11001100, 10101010, 10110100, 1010101010, 10101100, 11010010, 111000, 11100010, 1011001100, 101010101010, 1100110100, 11001010, 1010101100, 101010110010 ]
[ "nonn", "base" ]
A245175
[ 14, 8, 40, -16, 46, -44, 46, 68, -58, 100, -66, -54, 54, 82, 38, -204, 314, -214, -64, 176, -20, 6, 120, -72, -158, 34, -58, 28, 680, -590, 4, -2, 304, -386, 208, 44, -180, 146, -74, -114, 408, -458, 136, -158, 652, 340, -90...
[ "sign" ]
A005816
[ 1, 1, 3, 15, 138, 2021, 43581, 1295493, 50752145, 2533755933, 157055247261, 11836611005031, 1066129321651668, 113117849882149730, 13965580274228976000, 1.9851893126187238e+21, 3.219324061237332e+23, 5.907982966671235e+25, 1.2182062872168617e+28 ]
[ "nonn" ]
A273044
[ 1, 2, 5, 9, 10, 10, 17, 29, 29, 29, 47, 47, 47, 61, 71, 71, 71, 101, 109, 121, 121, 121, 121, 139, 139, 139, 139, 139, 139, 139, 139, 139, 139, 274, 278, 278, 278, 278, 278, 278, 278, 278, 278, 278, 278, 278, 278, 278, 2...
[ "nonn" ]
A131016
[ 4, 9, 4, 9, 6, 25, 15, 9, 10, 21, 34, 25, 14, 15, 46, 33, 35, 55, 39, 21, 22, 111, 93, 25, 26, 183, 55, 57, 146, 91, 94, 33, 34, 35, 106, 145, 38, 39, 118, 121, 206, 85, 87, 133, 46, 93, 95, 49, 295, 51, 205, 209, ...
[ "nonn" ]
A289184
[ 1, 10, 111, 1110, 11101, 111111, 1111111, 11111111, 111110111, 1111111000, 11111110111, 111111111111, 1111111110000, 11111111111111, 111111111100011, 1111111111111111, 11111111101111112, 111111111111111100, 1111111111100111100, 11111111111111110000 ]
[ "nonn", "easy" ]
A038783
[ 4, 10, 24, 208, 700, 8230, 29144, 381304, 19175140, 71582944, 3817763740, 54975633976, 209430787824, 3059510616424, 173215372864600, 9938978487990064, 38430716856090160, 2235968978631715000, 33731189163354610000, 131176846748288860000, 7.749524484709165e+21 ]
[ "nonn", "easy" ]
A079956
[ 1, 0, 0, 1, 1, 0, 2, 2, 1, 3, 5, 3, 6, 10, 9, 12, 21, 22, 27, 43, 52, 61, 91, 117, 140, 195, 260, 318, 426, 572, 718, 939, 1258, 1608, 2083, 2769, 3584, 4630, 6110, 7961, 10297, 13509, 17655, 22888, 29916, 39125, 50840, 66...
[ "nonn", "easy" ]
A212267
[ 1, 1, 2, 1, 4, 16, 1, 6, 72, 272, 1, 8, 168, 2896, 7936, 1, 10, 304, 10672, 203904, 353792, 1, 12, 480, 26400, 1198080, 22112000, 22368256, 1, 14, 696, 52880, 4071040, 208521728, 3412366336, 1903757312, 1, 16, 952, 92912, 10373760, 97...
[ "nonn", "tabl", "hard" ]
A006536
[ 2, 6, 38, 684, 50224, 13946352, 14061131152, 50947324188128, 666754350781269800, 3.1763991166456913e+22, 5.550343429517595e+27, 3.581353054755185e+33 ]
[ "nonn", "nice" ]
A180090
[ 81, 343, 400, 1705636, 3648100, 13645088, 25992000, 26680500, 29184800, 80802000, 110215125, 178054848, 180093375, 213444000, 310144500, 408632609, 575664500, 1055340196, 1120504500, 1476326929, 1667329664, 2066544500 ]
[ "dead" ]
A101702
[ 1, 2, 541, 52100, 58504, 66410, 430000, 863180, 8601400, 17927300, 27927300, 31000000, 665100000, 3715000000, 6739630000, 11000000000, 21000000000, 53100000000, 70858000000, 79637300000, 451000000000, 1715000000000, 2715000000000, 48304000000000, 340000000000000, 55...
[ "base", "nonn" ]
A220441
[ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 210, 210, 210, 210, 330, 330, 462, 462, 770, 1155, 1155, 1365, 1365, 1365, 1430, 2145, 2145, 3003, 3003, 5005, 5005, 5005, 5005, 6545, 6545, 7735, 7735, 8645, 8645, 12155, 1215...
[ "nonn" ]
A032929
[ 1, 2, 9, 10, 17, 18, 73, 74, 81, 82, 137, 138, 145, 146, 585, 586, 593, 594, 649, 650, 657, 658, 1097, 1098, 1105, 1106, 1161, 1162, 1169, 1170, 4681, 4682, 4689, 4690, 4745, 4746, 4753, 4754, 5193, 5194, 5201, 5202, 5257, 5258 ]
[ "nonn", "base" ]
A046441
[ 1, 2, 4, 6, 17, 25, 39, 46, 52, 58, 64, 66, 70, 71, 85, 88, 93, 102, 104, 107, 112, 114, 117, 120, 121, 140, 141, 169, 170, 171, 177, 188, 196, 200, 201, 210, 211, 228, 233, 235, 239, 253, 256, 258, 265, 279, 282, 285, 2...
[ "nonn", "base" ]
A327663
[ 0, 1, 2, 2, 2, 2, 6, 6, 6, 6, 8, 6, 9, 6, 6, 14, 15, 12, 18, 10, 9, 12, 15, 18, 20, 22, 24, 14, 23, 6, 30, 30, 30, 32, 30, 30, 30, 30, 30, 30, 35, 30, 38, 34, 30, 38, 44, 42, 42, 40, 42, 30, 51, 48, 45, 42,...
[ "nonn" ]
A169097
[ 1, 36, 1260, 44100, 1543500, 54022500, 1890787500, 66177562500, 2316214687500, 81067514062500, 2837362992187500, 99307704726562500, 3475769665429687300, 121651938290039060000, 4.257817840151367e+21, 1.4902362440529784e+23 ]
[ "nonn" ]
A218212
[ 0, 0, 4, 14, 29, 78, 225, 632, 1716, 4726, 13482, 38627, 112051, 327426, 959254, 2829346, 8391477, 24975616, 74606489, 223523560, 671611810 ]
[ "nonn", "base", "more" ]
A294562
[ 1, 2, 5, 10, 17, 29, 48, 80, 130, 212, 344, 558, 904, 1465, 2371, 3838, 6211, 10051, 16264, 26317, 42583, 68902, 111487, 180391, 291881, 472274, 764157, 1236433, 2000592, 3237027, 5237621, 8474650, 13712273, 22186925, 35899200, 58086127 ]
[ "nonn", "easy" ]
A058639
[ 1, 1, 3, 4, 6, 7, 13, 16, 22, 29, 40, 50, 69, 83, 110, 136, 174, 214, 272, 332, 413, 502, 618, 748, 915, 1095, 1329, 1590, 1910, 2272, 2718, 3216, 3823, 4508, 5332, 6262, 7378, 8630, 10119, 11802, 13784, 16023, 18650, 21612, 250...
[ "nonn" ]
A182382
[ 1, 3, 34, 5587, 22019098, 2777234353850 ]
[ "nonn" ]
A125740
[ 14, 52, 98, 105, 111, 114, 119, 164, 310, 444, 518, 602, 676, 686, 715, 735, 749, 833, 1220, 1278, 1339, 1474, 1752, 1946, 2023, 2054, 2166, 3016, 3104, 3502, 3568, 3924, 4107, 4308, 4802, 5145, 5243, 5334, 5718, 5831, 6394, 6724, 7...
[ "nonn" ]
A366518
[ 18, 6212, 1814624809158 ]
[ "nonn", "bref", "more" ]
A209387
[ 1, 3, 7, 13, 5, 15, 27, 41, 25, 43, 23, 45, 21, 47, 19, 49, 17, 51, 87, 125, 85, 127, 83, 37, 85, 35, 87, 33, 89, 31, 91, 29, 93, 159, 227, 157, 229, 155, 79, 157, 77, 159, 75, 161, 73, 163, 71, 165, 69, 167, 67, 1...
[ "nonn" ]
A105550
[ 18, 42, 66, 282, 618, 1374, 1698, 2022, 2766, 2778, 2874, 3594, 3918, 5718, 6918, 7734, 9138, 9582, 9726, 10806, 11334, 11442, 14226, 14394, 14802, 15306, 16386, 17994, 20226, 20334, 21954, 25374, 27366, 27822 ]
[ "nonn" ]
A251901
[ 5264, 1962, 2772, 4208, 10266, 17976, 28288, 66216, 121684, 210948, 502782, 957268, 1775466, 4040932, 8403774, 16389916, 36469244, 76274736, 161027262, 348138252, 747214432, 1575745364, 3498942344, 7430457700, 16117264814, 34861132976 ]
[ "nonn" ]
A337612
[ 1, 6, 10, 15, 20, 21, 35, 38, 42, 45, 52, 58, 63, 66, 68, 74, 76, 77, 78, 84, 85, 88, 92, 99, 110, 116, 117, 124, 130, 133, 143, 146, 153, 164, 171, 187, 189, 198, 208, 224, 228, 232, 238, 246, 247, 255, 261, 266, 268, ...
[ "nonn" ]
A240581
[ 2, -1, 1, -1, -8, -1, 1, 4, -4, -1, -1, 4, 8, 4, -1, -1, -8, -4, 4, 8, 1, 7, -4, -116, -32, -116, -4, 7, 5, 32, 28, 16, -16, -28, -32, -5, -2663, -388, 2524, 5072, 6112, 5072, 2524, -388, -2663, -691, -10264, -10652, -81...
[ "sign", "tabl", "frac", "changed" ]
A324663
[ 0, 0, 1, 0, 9, 10, 0, 740, 2, 3, 0, 7, 48, 49, 2, 0, 39, 348242, 3, 4, 59273, 0, 12, 5, 6, 523146, 3, 4, 0, 177, 3533234, 241226, 241225, 241226, 241227, 3, 0, 28, 101615, 101614, 93, 5, 4, 5, 420, 0, 49, 34, 35, 23, ...
[ "nonn" ]
A356773
[ 1, 1, 5, 22, 197, 2076, 29527, 477394, 9248745, 204340600, 5111234891, 142148945214, 4362830874877, 146338813894612, 5328688224075231, 209295914833477540, 8821420994034588000, 397128156446044060000, 1.901921825569785e+22, 9.655274687157446e+23 ]
[ "nonn" ]
A270031
[ 0, 0, 0, 0, 6, 0, 0, 0, 0, 0, 6, 7, 8, 9, 10, 11, 6, 13, 7, 15, 8, 17, 6, 19, 10, 7, 11, 23, 6, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 6, 8, 8, 8, 8, 8, 6, 9, 9, 9, 9, 9, 6, 7, 10, 10, 10, 10, 6, 11, 7,...
[ "nonn", "base" ]
A237624
[ 33040, 1064444, 33329056, 939401016, 26658031968, 703602018050, 18673864758392, 473785074873580, 12036531915220928, 297435912255839740, 7339018963453425000, 177985466773008780000, 4.304030211748928e+21 ]
[ "nonn" ]
A020474
[ 1, 0, 1, 0, 1, 2, 0, 0, 2, 4, 0, 0, 1, 5, 9, 0, 0, 0, 3, 12, 21, 0, 0, 0, 1, 9, 30, 51, 0, 0, 0, 0, 4, 25, 76, 127, 0, 0, 0, 0, 1, 14, 69, 196, 323, 0, 0, 0, 0, 0, 5, 44, 189, 512, 835, 0, 0, 0, 0, ...
[ "nonn", "tabl", "easy", "nice" ]
A306803
[ 0, 1, 3, 0, 4, 1, 5, 7, 2, 3, 0, 6, 8, 10, 11, 9, 4, 1, 13, 12, 5, 15, 17, 16, 7, 14, 18, 20, 19, 21, 2, 3, 0, 22, 23, 6, 24, 25, 26, 28, 27, 29, 8, 30, 32, 31, 10, 34, 35, 33, 36, 11, 37, 38, 9, 4, 1, ...
[ "base", "nonn" ]
A011420
[ 1, 2, 0, 2, 0, 4, 8, 8, 0, 2, 2, 9, 2, 7, 1, 5, 7, 1, 3, 7, 0, 9, 2, 5, 2, 3, 8, 4, 7, 7, 7, 5, 2, 3, 4, 8, 0, 7, 1, 6, 3, 5, 6, 0, 1, 6, 3, 3, 0, 3, 6, 9, 7, 2, 8, 5, 3, 7, 2, 7, 2, 7, 4, 5...
[ "nonn", "cons" ]
A061058
[ 1, 2, 5, 14, 42, 165, 714, 3094, 14858, 79534, 447051, 2714690, 17395070 ]
[ "dead" ]
A017051
[ 48828125, 743008370688, 116490258898219, 3670344486987776, 50542106513726820, 419430400000000000, 2472159215084012500, 11384956040305711000, 43513917611435835000, 143746751770690320000 ]
[ "nonn", "easy" ]
A363033
[ 0, 3, 0, 0, 11, 0, 0, 16, 0, 0, 21, 0, 8, 26, 0, 0, 31, 0, 0, 36, 21, 0, 41, 0, 0, 46, 0, 0, 77, 0, 0, 56, 0, 13, 61, 0, 31, 66, 0, 0, 71, 0, 0, 76, 36, 0, 112, 0, 0, 86, 0, 0, 132, 0, 0, 96, 0, 0, 10...
[ "nonn" ]
A087451
[ 2, 1, 13, 19, 97, 211, 793, 2059, 6817, 19171, 60073, 175099, 535537, 1586131, 4799353, 14316139, 43112257, 129009091, 387682633, 1161737179, 3487832977, 10458256051, 31385253913, 94134790219, 282446313697, 847255055011 ]
[ "easy", "nonn" ]
A105610
[ 0, 2, 8, 14, 17, 38, 47, 68, 77, 98, 104, 113, 134, 152, 164, 167, 182, 188, 218, 248, 272, 287, 299, 302, 308, 329, 344, 362, 404, 413, 437, 467, 482, 497, 503, 533, 584, 617, 638, 647, 698, 713, 728, 764, 803, 812, 827, ...
[ "nonn" ]
A204161
[ 1, -1, 3, -5, 1, 18, -36, 12, -1, 162, -360, 153, -22, 1, 1944, -4644, 2295, -435, 35, -1, 29160, -73548, 40419, -9135, 990, -51, 1, 524880, -1382184, 823284, -210924, 27720, -1953, 70, -1, 11022480 ]
[ "tabl", "sign" ]
A228894
[ 1, 2, 3, 4, 5, 7, 9, 10, 11, 13, 14, 15, 17, 18, 19, 22, 23, 24, 25, 26, 27, 29, 31, 32, 33, 35, 37, 40, 41, 43, 44, 47, 48, 51, 52, 53, 55, 56, 57, 58, 60, 61, 63, 64, 65, 67, 68, 69, 71, 75, 76, 78, 79, 80, ...
[ "nonn", "easy" ]
A372133
[ 0, 1, 2, 3, 4, 7, 8, 5, 6, 14, 16, 13, 32, 28, 56, 9, 64, 26, 128, 52, 112, 224, 256, 19, 12, 448, 10, 104, 512, 25, 1024, 11, 896, 1792, 3584, 23, 2048, 7168, 14336, 38, 4096, 50, 8192, 208, 416, 28672, 16384, 31, 24, ...
[ "nonn" ]
A142643
[ 5, 61, 173, 229, 397, 509, 677, 733, 1013, 1069, 1181, 1237, 1741, 2357, 2693, 2749, 2861, 2917, 3253, 3533, 3701, 4093, 4261, 4373, 4597, 4877, 4933, 5101, 5381, 5437, 5717, 6053, 6221, 6277, 6389, 6781, 6949, 7229, 7621, 7789, 7901, ...
[ "nonn", "easy" ]
A158919
[ 0, 1, 3, 5, 7, 9, 11, 12, 14, 16, 18, 20, 22, 23, 25, 27, 29, 31, 33, 34, 36, 38, 40, 42, 44, 45, 47, 49, 51, 53, 55, 57, 58, 60, 62, 64, 66, 68, 69, 71, 73, 75, 77, 79, 80, 82, 84, 86, 88, 90, 91, 93, 95, 97, ...
[ "nonn" ]
A068456
[ 1, 0, 0, 0, 1, 0, 0, 0, 5, 7, 9, 5, 2, 12, 13, 10, 10, 4, 4, 4, 14, 4, 10, 14, 12, 9, 22, 9, 11, 9, 8, 14, 26, 25, 28, 22, 35, 0, 24, 0, 20, 18, 13, 21, 31, 30, 22, 24, 19, 34, 16, 42, 36, 46, 35, 46, 32,...
[ "nonn" ]
A256347
[ 41, 123, 131, 287, 317, 393, 503, 547, 727, 779, 861, 917, 951, 1091, 1237, 1271, 1277, 1509, 1517, 1627, 1637, 1641, 1681, 1763, 2089, 2181, 2219, 2239, 2337, 2357, 2383, 2489, 2531, 2671, 2751, 2789 ]
[ "nonn" ]
A265534
[ 0, 1, 2, 3, 4, 4, 11, 11, 11, 11, 11, 11, 22, 22, 22, 22, 22, 22, 33, 33, 33, 33, 33, 33, 44, 44, 101, 101, 101, 101, 101, 111, 111, 111, 111, 111, 121, 121, 121, 121, 121, 131, 131, 131, 131, 131, 141, 141, 141, 141, ...
[ "nonn", "base" ]
A054359
[ 1, 1, 2, 5, 12, 35, 104, 343, 1050, 3070, 6620, 23449, 38669, 109104, 279583, 546893, 827035, 3057332, 3381124, 12126683, 21921192, 37008138, 53327764, 220908809, 271293803 ]
[ "nonn", "hard" ]
A014533
[ 1, 5, 21, 77, 266, 882, 2850, 9042, 28314, 87802, 270270, 827190, 2520336, 7651632, 23162976, 69954048, 210859245, 634569201, 1907165337, 5725520801, 17172595110, 51465297950, 154135675070, 461366154990, 1380317174145 ]
[ "nonn", "easy" ]
A123162
[ 1, 1, 1, 1, 3, 1, 1, 5, 10, 1, 1, 7, 35, 21, 1, 1, 9, 84, 126, 36, 1, 1, 11, 165, 462, 330, 55, 1, 1, 13, 286, 1287, 1716, 715, 78, 1, 1, 15, 455, 3003, 6435, 5005, 1365, 105, 1, 1, 17, 680, 6188, 19448, 24310, 123...
[ "nonn", "tabl", "easy" ]
A363495
[ 1, 2, 17, 202, 3899, 98282, 3270604, 134513166, 6744026175, 400657370384, 27819913699591, 2222485356153758, 202085549223540500, 20700107045049815000, 2.3691162590548585e+21, 3.0071232574571565e+23, 4.206484414017892e+25, 6.448050588990736e+27 ]
[ "nonn" ]
A032698
[ 17, 45, 55, 57, 63, 69, 75, 81, 87, 99, 101, 105, 109, 117, 129, 131, 133, 135, 147, 153, 161, 167, 169, 171, 177, 181, 187, 189, 197, 201, 203, 207, 209, 213, 215, 217, 221, 227, 243, 245, 259, 261, 269, 271, 273, 279, 281,...
[ "nonn", "base", "less" ]
A295864
[ 1, 2, 12, 120, 420, 7560, 18480, 480480, 900900, 30630600, 46558512, 1955457504, 2498640144, 124932007200, 137680171200, 7985449929600, 7735904619300, 510569704873800, 441233078286000, 32651247793164000, 25467973278667920, 2088373808850769400, 1484298740174927000 ]
[ "nonn" ]
A200655
[ 1, 3, 5, 7, 8, 19, 20, 23, 96, 190, 312, 400, 434, 852, 980, 1063, 1208, 3960, 5464, 6694, 7178, 13118, 13680, 18803, 27445, 28541, 42031, 73209, 83873 ]
[ "nonn" ]
A187194
[ 0, 0, 2304, 156672, 2169600, 15220800, 72182880, 264520704, 806827392, 2144534400, 5120913600, 11222069760 ]
[ "nonn", "more" ]
A267756
[ 0, 1, 4, 8, 11, 12, 13, 15, 16, 19, 22, 27, 31, 34, 35, 38, 41, 42, 46, 48, 52, 53, 56, 57, 61, 62, 64, 65, 66, 69, 70, 71, 73, 74, 76, 77, 78, 79, 80, 83, 84, 86, 87, 88, 89, 91, 93, 95, 99, 100, 103, 104, 107, ...
[ "nonn" ]
A046896
[ 1, 9, 3969, 5041, 9409, 89401, 35010889, 478953225, 741091729, 282110761881, 370672751241, 1930979822409, 5548799536921, 6445713623281, 81193957971361 ]
[ "nonn", "easy", "nice" ]
A370136
[ 1, 4, 1, 32, 5, 1, 55, 60, 12, 1, 1292, 195, 71, 16, 1, 22532, 2505, 841, 384, 9, 1, 382892, 102723, 8897, 8640, 191, 21, 1, 2469635, 3502740, 323328, 34133, 9980, 756, 24, 1, 111738812, 18755325, 10308201, 1568312, 50621, 5211, 371...
[ "nonn", "tabl" ]
A285450
[ 3, 56, 179, 34, 202, 536, 607, 1182, 1236, 3875, 3076, 2142, 4574, 5378, 9347, 14524, 2013, 8403, 13037, 9534, 20939, 1987, 28882, 27146, 16292, 34546, 48493, 85926, 52953, 48318, 64558, 116514, 49665, 90279, 46911, 117256, 61286, 139083, 1...
[ "nonn", "base", "easy" ]
A139557
[ 2, 4, 9, 12, 25, 26, 35, 38, 39, 40, 55, 56, 65, 68, 69, 70, 85, 86, 133, 134, 135, 136, 161, 162, 165, 166, 171, 172, 203, 204, 217, 218, 219, 221, 235, 236, 259, 262, 267, 268, 451, 452, 559, 562, 565, 566, 611, 612, 6...
[ "nonn" ]
A136557
[ 1, 2, 6, 45, 1436, 171836, 68149425, 89431630740, 396956313475102, 6099399658235428000, 3.310077609262125e+23, 6.448428965061291e+28, 4.567771241849754e+34 ]
[ "nonn" ]
A079990
[ 1, 1, 1, 2, 6, 16, 36, 73, 157, 353, 797, 1776, 3916, 8636, 19145, 42504, 94286, 208948, 462907, 1025863, 2274069, 5040891, 11173063, 24763854, 54886846, 121655063, 269646786, 597664017, 1324697483, 2936135519, 6507831521, 14424377636 ]
[ "nonn" ]
A209438
[ 1, 1, 1, 1, 2, 1, 1, 4, 2, 1, 1, 7, 4, 2, 1, 1, 13, 8, 4, 2, 1, 1, 24, 16, 8, 4, 2, 1, 1, 44, 28, 16, 8, 4, 2, 1, 1, 81, 49, 32, 16, 8, 4, 2, 1, 1, 149, 91, 64, 32, 16, 8, 4, 2, 1, 1, 274, 169, 112, ...
[ "nonn", "tabl" ]
A270634
[ 1, 4, 9, 32, 33, 92, 65, 176, 53, 316, 113, 432, 189, 548, 284, 801, 300, 1028, 420, 1272, 476, 1488, 672, 1840, 676, 2180, 840, 2488, 976, 2828, 1212, 3320, 1260, 3716, 1424, 4272, 1448, 4656, 1780, 5256, 1932, 5700, 2212, 6284, ...
[ "nonn", "easy" ]
A224392
[ 64, 1000, 6094, 27790, 102232, 319769, 881519, 2196522, 5038720, 10788462, 21789398, 41858498, 76994510, 136338455, 233448747, 387963222, 627730762, 991506308, 1532314870, 2321602662, 3454306716, 5054988261, 7285189791 ]
[ "nonn" ]
A214531
[ 18, 81, 1188, 1818, 1881, 8118, 8181, 8811, 111888, 118188, 118818, 118881, 181188, 181818, 181881, 188118, 188181, 188811, 811188, 811818, 811881, 818118, 818181, 818811, 881118, 881181, 881811, 888111 ]
[ "nonn", "base", "easy" ]
A320298
[ 1, 3, 3, 5, 1, 1, 1, 1, 1, 2, 1, 2, 2, 2, 4, 4, 5, 2, 1, 2, 4, 1, 5, 4, 1, 2, 3, 1, 4, 3, 1, 4, 1, 3, 1, 4, 2, 4, 2, 1, 1, 8, 1, 2, 1, 1, 6, 1, 1, 3, 1, 2, 4, 3, 2, 3, 7, 3, 3, 1, 1, 6, 4, 4...
[ "nonn", "base" ]
A308070
[ 0, 1, 2, 3, 4, 5, 6, 102616333034, 102620103253, 103055445560, 206154633166, 206154633200, 212216263215, 212220033434, 315315450515, 321340554340, 424436332033, 424440102253, 430461435550, 430501403606, 533560623156, 533600556144 ]
[ "nonn", "base" ]
A071417
[ 0, 1, 0, 3, 1, 0, 6, 3, 1, 0, 9, 5, 3, 1, 0, 12, 7, 4, 3, 1, 0, 15, 9, 6, 4, 3, 1, 0, 19, 12, 8, 6, 4, 3, 1, 0, 22, 14, 10, 8, 6, 4, 3, 1, 0, 26, 17, 12, 9, 7, 5, 4, 3, 1, 0, 30, 20, 15, 11, 9, 7,...
[ "nonn", "tabl" ]
A284754
[ 1, 59, 436, 995752, 180707 ]
[ "nonn", "more" ]
A062217
[ 5, 9, 11, 3015, 3407, 6959, 9599, 11399, 16593, 25883 ]
[ "nonn", "base" ]
A088400
[ 29, 19, 0, 14, 13, 0, 8, 7, 0, 29, 19, 0, 5, 4, 0, 8, 7, 0, 2, 19, 0, 14, 4, 0, 17, 7, 0, 2, 1, 0, 5, 4, 0, 8, 7, 0, 2, 1, 0, 14, 4, 0, 8, 7, 0, 2, 1, 0, 5, 13, 0, 8, 7, 0, 11, 1, 0, 5, 4, 0, 17, ...
[ "nonn", "base" ]
A006163
[ 1, 1, 2, 3, 4, 5, 5, 6, 7, 8, 9, 10, 10, 10, 11, 12, 13, 14, 15, 16, 16, 17, 17, 18, 19, 20, 21, 22, 23, 24, 24, 25, 26, 26, 27, 28, 29, 30, 31, 32, 33, 34, 34, 34, 34, 35, 36, 37, 37, 38, 39, 40, 41, 42, 43,...
[ "nonn", "easy" ]
A162174
[ 5, 13, 19, 23, 31, 37, 43, 47, 53, 61, 73, 97, 113, 127, 131, 139, 151, 157, 163, 173, 181, 199, 211, 223, 233, 257, 263, 271, 293, 307, 313, 317, 337, 353, 373, 389, 397, 401, 421, 457, 479, 509, 523, 541, 547, 563, 571, ...
[ "nonn" ]
A213243
[ 1, 1, 7, 5, 31, 21, 127, 85, 511, 341, 2047, 1365, 8191, 5461, 32767, 21845, 131071, 87381, 524287, 349525, 2097151, 1398101, 8388607, 5592405, 33554431, 22369621, 134217727, 89478485, 536870911, 357913941, 2147483647, 1431655765, 8589934591, 5726623...
[ "nonn" ]
A343278
[ 1, 1, 1, 3, 7, 25, 90, 350, 1701, 6951, 42525, 179487, 1323652, 5715424, 49329280, 216627840, 2141764053, 9528822303, 106175395755, 477297033785, 5917584964655, 26826851689001, 366282500870286, 1672162773483930, 24930204590758260, 114485073343744260 ]
[ "nonn" ]
A318069
[ 1, 6, 18, 73, 316, 3029, 46884, 935951, 38183961, 2877277695, 323244675173, 63938089963412, 22744080515948230, 13243562482553494000 ]
[ "nonn" ]
A290519
[ 1, 2, 7, 14, 29, 63, 127, 255, 503, 1016, 2039, 4095, 8176, 16383, 32739, 65535, 130943, 262143, 524095, 1048571, 2097135, 4194271, 8388595, 16777215, 33554367, 67108603, 134217527, 268433611, 536868671, 1073741823, 2147483359, 4294967291, 8589901799 ]
[ "nonn", "easy" ]
A196717
[ 17, 468, 7368, 222112, 5443550, 139260414, 3464871506, 87347779774, 2189117562853, 54554907624355, 1364716687922414, 34203898910729036, 856342981705944400, 21436725243287302000, 536742033291537800000 ]
[ "nonn" ]