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 A043563 #9 Apr 23 2021 21:54:45
%S A043563 1,1,1,1,1,1,1,1,1,1,1,2,1,2,2,2,2,2,2,2,2,2,2,2,1,2,2,2,2,2,2,2,2,2,
%T A043563 2,2,1,2,2,2,2,2,2,2,2,2,2,2,1,2,2,2,2,2,2,2,2,2,2,2,1,2,2,2,2,2,2,2,
%U A043563 2,2,2,2,1,2,2,2,2,2,2,2,2,2,2,2,1,2,2,2,2,2
%N A043563 Number of runs in base-11 representation of n.
%C A043563 Every positive integers occurs infinitely many times. See A297770 for a guide to related sequences.
%t A043563 b = 11; s[n_] := Length[Split[IntegerDigits[n, b]]];
%t A043563 Table[s[n], {n, 1, 200}]
%Y A043563 Cf. A297779 (number of distinct runs), A297770.
%K A043563 nonn,base
%O A043563 0,12
%A A043563 _Clark Kimberling_