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 A030873 #4 Mar 30 2012 18:36:23 %S A030873 1,2,7,31,156,936,6557,52457,472118,4721185,51933039,623196471, %T A030873 8101554127,113421757790,1701326366855,27221221869682,462760771784596, %U A030873 8329693892122733,158264183950331941,3165283679006638838 %N A030873 [ exp(5/19)*n! ]. %K A030873 nonn %O A030873 1,2 %A A030873 _Simon Plouffe_