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 A030577 #6 Mar 30 2012 18:56:18 %S A030577 1,1,1,3,1,1,1,1,1,1,1,1,1,1,2,1,1,1,1,1,1,1,2,1,1,1,1,1,2,1,1,1,1,2, %T A030577 5,2,2,2,1,2,1,1,1,1,1,2,1,1,1,1,1,2,1,1,1,1,1,1,1,1,2,1,1,1,1,1,1,1, %U A030577 1,1,1,2,1,1,1,1,1,1,1,1,1,1,2,1,1,1 %N A030577 Length of n-th run of digit 2 in A030567. %K A030577 nonn,base %O A030577 1,4 %A A030577 _Clark Kimberling_