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 A275983 #11 Sep 08 2022 08:46:17 %S A275983 4,0,2,8,7,4,1,1,5,7,7,8,9,8,8,7,7,8,1,8,1,8,7,3,3,2,9,0,7,1,5,9,1,7, %T A275983 6,7,7,2,2,4,3,8,5,0,6,8,9,1,6,2,2,4,2,0,0,4,1,0,2,9,9,6,3,5,7,8,6,9, %U A275983 4,5,9,5,2,4,0,8,8,7,4,0,0,8,6,7,6,3,9,8,6,1,4,6,1,4,6,6,5,3,7,1,0,3,8,3,3 %N A275983 Decimal expansion of 2^23209 - 1, the 26th Mersenne prime A000668(26). %H A275983 Arkadiusz Wesolowski, <a href="/A275983/b275983.txt">Table of n, a(n) for n = 6987..13973</a> %H A275983 Wikipedia, <a href="http://en.wikipedia.org/wiki/Mersenne_prime">Mersenne prime</a> %F A275983 2^A000043(26) - 1. %e A275983 40287411577898877818187332907159176772243850689162242004102996357869459... %t A275983 First@RealDigits@N[2^23209 - 1, 100] (* _G. C. Greubel_, Aug 15 2016 *) %o A275983 (Magma) Reverse(Intseq(2^23209-1))[1..105]; %o A275983 (PARI) eval(Vec(Str(2^23209-1)))[1..105] %Y A275983 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), A275981 = A000668(24), A275982 = A000668(25), A275984 = A000668(27). %K A275983 nonn,cons,easy,fini,full %O A275983 6987,1 %A A275983 _Arkadiusz Wesolowski_, Aug 15 2016