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 A030382 #11 Apr 01 2020 01:54:07 %S A030382 1,1,2,1,1,2,1,1,1,1,1,1,2,1,1,1,1,1,1,3,1,1,1,2,1,1,1,2,1,1,1,3,2,2, %T A030382 3,1,1,1,1,1,1,2,1,1,1,1,1,1,2,1,1,1,1,1,1,2,1,1,1,1,1,1,1,1,1,1,1,1, %U A030382 1,1,1,2,2,2,3,1,1,1,1,1,1,2,1,1,1,1,1 %N A030382 Length of n-th run of digit 3 in A030373. %K A030382 nonn,base %O A030382 1,3 %A A030382 _Clark Kimberling_ %E A030382 a(89) onward corrected by _Sean A. Irvine_, Mar 31 2020