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 A116642 #2 Mar 31 2012 13:21:11 %S A116642 1,101,111,1011,10011,10111,11101,11111,100011,100101,101111,110001, %T A116642 110101,1000001,1000011,1001001,1001111,1010101,1011001,1100001, %U A116642 1100101,1100111,1110111,1111001,1111101,10000011,10000101,10001111 %N A116642 A116641 in binary. %Y A116642 Cf. a(n) = A007088(A116641(n)). %K A116642 nonn,base %O A116642 0,2 %A A116642 _Antti Karttunen_, Feb 20 2006