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 A115810 #2 Mar 31 2012 13:21:10 %S A115810 0,11111,111110,111111,1111100,1111110,1111111,11111000,11111100, %T A115810 11111110,11111111,111110000,111111000,111111100,111111110,111111111, %U A115810 1111100000,1111110000,1111111000,1111111100,1111111110,1111111111 %N A115810 Sequence A115809 in binary. %Y A115810 Cf. a(n) = A007088(A115809(n)). %K A115810 nonn,base %O A115810 0,2 %A A115810 _Antti Karttunen_, Feb 01 2006