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 A122240 #2 Mar 31 2012 13:21:11 %S A122240 110100,11110000,1111000100,111110000100,11110011000100, %T A122240 1111110000010100,111100100111100000,11110001011100100100, %U A122240 1111111000101100000100,111100101001101001110000 %N A122240 a(n) = A007088(A122239(n)). %Y A122240 Cf. A080070, A122230, A122233, A122236, A122243, A122246. %K A122240 nonn,base %O A122240 1,1 %A A122240 _Antti Karttunen_, Sep 14 2006