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 A115826 #2 Mar 31 2012 13:21:10 %S A115826 101,1010,10100,10101,101000,101001,101010,1001111,1010000,1010010, %T A115826 1010100,1010101,10011110,10100000,10100011,10100100,10101000, %U A115826 10101001,10101010,100111100,101000000,101000011,101000101,101000110 %N A115826 Sequence A115825 in binary. %Y A115826 Cf. a(n) = A007088(A115825(n)). %K A115826 nonn,base %O A115826 1,1 %A A115826 _Antti Karttunen_, Feb 01 2006