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 A115775 #2 Mar 31 2012 13:21:10 %S A115775 0,101,1010,10100,10101,101000,101010,1010000,1010100,1010101, %T A115775 10100000,10101000,10101010,101000000,101010000,101010100,101010101, %U A115775 1010000000,1010000101,1010100000,1010101000,1010101010,10100000000 %N A115775 Sequence A115774 in binary. %Y A115775 Cf. a(n) = A007088(A115774(n)). %K A115775 nonn,base %O A115775 0,2 %A A115775 _Antti Karttunen_, Jan 30 2006