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 A115808 #2 Mar 31 2012 13:21:10 %S A115808 0,11,110,1100,11000,110000,110011,1100000,1100110,11000000,11000011, %T A115808 11001100,110000000,110000011,110000110,110011000,1100000000, %U A115808 1100000011,1100000110,1100001100,1100110000,1100110011,11000000000 %N A115808 Sequence A115807 in binary. %Y A115808 Cf. a(n) = A007088(A115807(n)). %K A115808 nonn,base %O A115808 0,2 %A A115808 _Antti Karttunen_, Feb 01 2006