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 A113522 #16 Jul 31 2024 07:59:33 %S A113522 1,3,7,9,11,13,19,21,27,33,37,39,57,63,77,81,91,99,111,117,133,143, %T A113522 171,189,209,231,247,259,273,297,333,351,399,407,429,481,513,567,627, %U A113522 693,703,741,777,819,891,999,1001,1053,1197,1221,1287,1443,1463,1539,1729 %N A113522 Divisors of 10^18 - 1. %H A113522 Nathaniel Johnston, <a href="/A113522/b113522.txt">Table of n, a(n) for n = 1..640</a> (full sequence) %H A113522 <a href="/index/Di#divisors">Index entries for sequences related to divisors of numbers</a> %t A113522 Divisors[10^18 - 1][[;;100]] (* _Paolo Xausa_, Jul 31 2024 *) %o A113522 (PARI) divisors(10^18-1) \\ _Charles R Greathouse IV_, Jun 21 2017 %Y A113522 Cf. A018282, A018766, A027894, A027893, A027892, A027891, A027890, A027889, A027895, A027896, A027897, A109933, A106305, A111117, A111211, A113116, A001270, A007138, A046107, A112505. %K A113522 nonn,fini,full,easy %O A113522 1,2 %A A113522 Douglas Winston (douglas.winston(AT)srupc.com), Jan 12 2006