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 A031226 #6 Mar 30 2012 18:56:21 %S A031226 1,1,1,1,2,1,1,1,1,1,1,1,1,2,1,1,1,1,1,1,1,1,2,1,1,1,1,1,1,1,1,2,1,1, %T A031226 1,1,1,1,1,1,3,2,2,2,2,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, %U A031226 1,2,1,1,1,1,1,1,1,1,2,1,1,1,1,1 %N A031226 Length of n-th run of digit 0 in A031219. %K A031226 nonn,base %O A031226 1,5 %A A031226 _Clark Kimberling_