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 A158718 #4 Mar 31 2012 10:26:14 %S A158718 0,941,9601,0,968041 %N A158718 Largest emirp with n distinct nonprime digits (or 0, if no such number exists). %Y A158718 A006567, A030540 %K A158718 fini,full,nonn,base %O A158718 2,2 %A A158718 _Lekraj Beedassy_, Mar 24 2009