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 A173105 #2 Mar 30 2012 18:40:51 %S A173105 2,3,5,7,13,15,21,23,27,35,37,51,57,73,107 %N A173105 The 15 supersingular primes written in octal. %C A173105 The supersingular primes are the primes that divide the order of the Monster group. %F A173105 a(n) = A007094(A002267(n)). %Y A173105 Cf. A000040, A002267, A007094. %K A173105 base,fini,full,nonn %O A173105 1,1 %A A173105 _Jonathan Vos Post_, Feb 09 2010