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 A030312 #12 Jan 25 2020 00:40:22 %S A030312 1,1,2,1,1,3,2,1,1,1,2,1,1,4,3,1,2,2,2,1,1,1,1,1,1,3,2,1,1,1,2,1,1,5, %T A030312 4,1,3,3,2,2,1,2,1,2,2,3,1,2,1,1,1,1,1,1,2,1,1,1,1,1,1,4,3,1,2,2,2,1, %U A030312 1,1,1,1,1,3,2,1,1,1,2,1,1,6,5,1,4,4,2,3,1,3,1 %N A030312 Length of n-th run of 0's in A030308. %Y A030312 Cf. A030305. %K A030312 nonn %O A030312 1,3 %A A030312 _Clark Kimberling_ %E A030312 First 1 added by _Philippe Deléham_, Oct 20 2011