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 A043695 #8 Jun 18 2021 22:36:07 %S A043695 6,8,9,10,11,12,13,15,16,17,18,19,20,22,23,24,25,26,27,29,30,31,32,33, %T A043695 34,36,42,44,45,46,47,50,57,64,71,72,79,84,85,87,88,89,93,100,107,108, %U A043695 115,122,126,127,128,130,131,136,143,144,151 %N A043695 Numbers whose base-6 representation has an even number of runs. %K A043695 nonn,base %O A043695 1,1 %A A043695 _Clark Kimberling_