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 A113457 #3 Mar 30 2012 17:38:08 %S A113457 1,3,3,213,213,1383,3091,8129 %N A113457 Least number that begins an n-term arithmetic progression with common difference 2 in which all terms have the same prime signature. %C A113457 Second column of A113456. a(9) >= 37887000000. %Y A113457 Cf. A092209 A113456 A113466. %K A113457 hard,nonn,less %O A113457 1,2 %A A113457 _David Wasserman_, Jan 08 2006