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 A115804 #2 Mar 31 2012 13:21:10 %S A115804 0,11,110,1100,1111,11000,11011,11110,11111,110000,110011,110110, %T A115804 111100,111110,111111,1100000,1100110,1101100,1111000,1111100,1111110, %U A115804 1111111,11000000,11000011,11001100,11001111,11011000,11011011 %N A115804 Sequence A115803 in binary. %Y A115804 Cf. a(n) = A007088(A115803(n)). %K A115804 nonn,base %O A115804 0,2 %A A115804 _Antti Karttunen_, Feb 01 2006