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 A043645 #11 Aug 29 2025 16:15:37 %S A043645 11,13,14,15,16,17,18,19,20,21,22,23,25,26,27,28,29,30,31,32,33,34,35, %T A043645 37,38,39,40,41,42,43,44,45,46,47,49,50,51,52,53,54,55,56,57,58,59,61, %U A043645 62,63,64,65,66,67,68,69,70,71,73,74,75,76 %N A043645 Numbers whose base-11 representation has exactly 2 runs. %Y A043645 Subsequence of A043700. %K A043645 nonn,base,changed %O A043645 1,1 %A A043645 _Clark Kimberling_