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 A122238 #2 Mar 31 2012 13:21:11 %S A122238 7,22,61,192,575,2024,6090,20324,81824,248673,935492,3249468 %N A122238 Iterates of A122227, starting from A122227(7)=22. %Y A122238 A122239. %K A122238 nonn %O A122238 1,1 %A A122238 _Antti Karttunen_, Sep 14 2006