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 A031244 #6 Mar 30 2012 18:56:21 %S A031244 1,1,1,3,1,1,1,1,1,1,1,1,2,1,1,1,1,1,2,1,1,1,1,2,1,1,1,2,5,2,2,1,2,1, %T A031244 1,1,1,2,1,1,1,1,1,1,1,2,1,1,1,1,1,1,1,1,2,1,1,1,1,1,1,1,1,2,1,1,1,1, %U A031244 1,1,1,1,2,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,2 %N A031244 Length of n-th run of digit 2 in A031235. %K A031244 nonn,base %O A031244 1,4 %A A031244 _Clark Kimberling_