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 A026611 #4 Mar 30 2012 18:56:09 %S A026611 1,2,0,2,0,2,0,1,1,2,0,2,0,1,1,1,2,1,0,1,1,1,2,0,2,0,1,2,0,2,0,1,1,1, %T A026611 2,1,0,1,1,1,2,0,2,0,1,1,2,0,2,0,2,0,1,2,0,1,1,1,2,0,2,0,1,1,2,0,2,0, %U A026611 2,0,1,1,2,0,2,0,1,1,1,2,0,2,0,2,0,1,1,1,2,1 %N A026611 Number of 3's between n-th 2 and (n+1)st 2 in A026600. %K A026611 nonn %O A026611 1,2 %A A026611 _Clark Kimberling_