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 A026612 #4 Mar 30 2012 18:56:09 %S A026612 0,1,1,1,2,0,2,0,1,1,2,0,2,0,2,0,1,1,2,0,2,0,1,1,1,2,0,1,2,0,2,0,2,0, %T A026612 1,1,2,0,2,0,1,1,1,2,1,0,1,1,1,2,0,2,0,1,2,0,2,0,1,1,1,2,1,0,1,1,1,2, %U A026612 0,2,0,1,1,2,0,2,0,2,0,1,1,1,2,0,2,0,2,0,1,1 %N A026612 a(n) = number of 1's between n-th 3 and (n+1)st 3 in A026600. %K A026612 nonn %O A026612 1,5 %A A026612 _Clark Kimberling_