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 A030557 #6 Mar 30 2012 18:56:18 %S A030557 1,1,3,1,1,1,1,1,1,1,1,1,2,1,1,1,2,5,2,2,2,1,1,2,1,1,1,1,1,2,1,1,1,1, %T A030557 1,2,1,1,1,1,1,2,1,1,1,1,1,2,1,1,1,1,1,1,1,1,1,1,2,1,1,1,1,1,1,1,1,1, %U A030557 1,2,1,1,1,1,1,1,1,1,1,1,2,1,1,1,1,1,1 %N A030557 Length of n-th run of digit 1 in A030548. %K A030557 nonn,base %O A030557 1,3 %A A030557 _Clark Kimberling_