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 A043700 #8 Jun 18 2021 22:36:33 %S A043700 11,13,14,15,16,17,18,19,20,21,22,23,25,26,27,28,29,30,31,32,33,34,35, %T A043700 37,38,39,40,41,42,43,44,45,46,47,49,50,51,52,53,54,55,56,57,58,59,61, %U A043700 62,63,64,65,66,67,68,69,70,71,73,74,75,76 %N A043700 Numbers whose base-11 representation has an even number of runs. %K A043700 nonn,base %O A043700 1,1 %A A043700 _Clark Kimberling_