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 A115781 #2 Mar 31 2012 13:21:10 %S A115781 1111,11110,11111,101101,101111,111100,111101,111110,111111,1011010, %T A115781 1011110,1011111,1111000,1111010,1111100,1111101,1111110,1111111, %U A115781 10100101,10101101,10101111,10110100,10110101,10111100,10111101 %N A115781 Sequence A115776 in binary. %Y A115781 Cf. a(n) = A007088(A115776(n)). %K A115781 nonn,base %O A115781 1,1 %A A115781 _Antti Karttunen_, Jan 30 2006