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 A068530 #2 Mar 31 2012 13:50:43 %S A068530 5,13,7,7,11,37,79 %N A068530 n* values for self-contained numbers. %D A068530 R. K. Guy, Unsolved Problems in Number Theory, E16. %Y A068530 Cf. A005184, A068529. %K A068530 more,nonn %O A068530 1,1 %A A068530 _Naohiro Nomoto_, Mar 22 2002