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 A115806 #2 Mar 31 2012 13:21:10 %S A115806 0,11,110,1100,11000,110000,1100000,11000000,11000011,110000000, %T A115806 110000011,110000110,1100000000,1100000011,1100000110,1100001100, %U A115806 11000000000,11000000011,11000000110,11000001100,11000011000 %N A115806 Sequence A115805 in binary. %Y A115806 Cf. a(n) = A007088(A115805(n)). Differs from A115830 for the first time at n=21, where A115830(21)=101110100011 while a(21)=110000000000. %K A115806 nonn,base %O A115806 0,2 %A A115806 _Antti Karttunen_, Feb 01 2006