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 A169684 #24 Oct 07 2023 21:38:23 %S A169684 1,6,2,2,5,9,2,7,6,8,2,9,2,1,3,3,6,3,3,9,1,5,7,8,0,1,0,2,8,8,1,2,7 %N A169684 Decimal expansion of 2^107 - 1. %C A169684 The 11th Mersenne prime A000668(11), see also the formula, and A134731, A169681, A169685 for the next three terms in that sequence. - _M. F. Hasler_, Jan 09 2013 %H A169684 Wikipedia, <a href="http://en.wikipedia.org/wiki/Mersenne_prime">Mersenne prime</a> %F A169684 2^107 - 1 = 2^A000043(11) - 1 = A000668(11). - _M. F. Hasler_, Jan 09 2013 %e A169684 162259276829213363391578010288127. %t A169684 IntegerDigits[2^107-1] (* _Paolo Xausa_, Oct 07 2023 *) %o A169684 (Magma) Reverse(Intseq(2^107-1)); // _Arkadiusz Wesolowski_, Oct 18 2014 %o A169684 (PARI) eval(Vec(Str(2^107-1))) \\ or simply: digits(2^107-1) in PARI version 2.6+. - _M. F. Hasler_, Jan 09 2013 %Y A169684 Cf. A169681 = A000668(12), A169685 = A000668(13), A204063 = A000668(14), A248931 = A000668(15), A248932 = A000668(16), A248933 = A000668(17), A248934 = A000668(18), A248935 = A000668(19), A248936 = A000668(20). %K A169684 nonn,cons,easy,fini,full %O A169684 33,2 %A A169684 _N. J. A. Sloane_, Apr 13 2010