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 A092409 #8 Dec 18 2011 14:09:44 %S A092409 7,13,19,23,25,31,33,37,43,47,49,53,55,61,63,67,73,75,79,83,85,91,93, %T A092409 97 %N A092409 Erroneous version of A007921. %C A092409 89 is missing. %D A092409 Florentin Smarandache, "Sequences of Numbers involved in Unsolved Problems," Phoenix, 2006. %K A092409 dead %O A092409 1,1