This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A275981 #11 Sep 08 2022 08:46:17 %S A275981 4,3,1,5,4,2,4,7,9,7,3,8,8,1,6,2,6,4,8,0,5,5,2,3,5,5,1,6,3,3,7,9,1,9, %T A275981 8,3,9,0,5,3,9,3,5,0,4,3,2,2,6,7,1,1,5,0,5,1,6,5,2,5,0,5,4,1,4,0,3,3, %U A275981 3,0,6,8,0,1,3,7,6,5,8,0,9,1,1,3,0,4,5,1,3,6,2,9,3,1,8,5,8,4,6,6,5,5,4,5,2 %N A275981 Decimal expansion of 2^19937 - 1, the 24th Mersenne prime A000668(24). %H A275981 Arkadiusz Wesolowski, <a href="/A275981/b275981.txt">Table of n, a(n) for n = 6002..12003</a> %H A275981 Wikipedia, <a href="http://en.wikipedia.org/wiki/Mersenne_prime">Mersenne prime</a> %F A275981 2^A000043(24) - 1. %e A275981 43154247973881626480552355163379198390539350432267115051652505414033306... %t A275981 First@RealDigits@N[2^19937 - 1, 100] (* _G. C. Greubel_, Aug 15 2016 *) %o A275981 (Magma) Reverse(Intseq(2^19937-1))[1..105]; %o A275981 (PARI) eval(Vec(Str(2^19937-1)))[1..105] %Y A275981 Cf. A169684 = A000668(11), A169681 = A000668(12), A169685 = A000668(13), A204063 = A000668(14), A248931 = A000668(15), A248932 = A000688(16), A248933 = A000668(17), A248934 = A000668(18), A248935 = A000668(19), A248936 = A000668(20), A275977 = A000668(21), A275979 = A000668(22), A275980 = A000668(23), A275982 = A000668(25), A275983 = A000668(26), A275984 = A000668(27). %K A275981 nonn,cons,easy,fini,full %O A275981 6002,1 %A A275981 _Arkadiusz Wesolowski_, Aug 15 2016