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 A050006 #10 Jul 04 2021 13:35:48 %S A050006 1,3,4,9,11,15,16,17,22,27,30,33,36,38,39,40,48,52,55,59,60,66,67,72, %T A050006 75,76,80,83,87,89,94,97,100,105,107,110,114,116,121,124,125,129,132, %U A050006 135,138,143,145,149,152,155,161,164,165,166 %N A050006 Numbers k such that A050004(k) < A050004(k+1). %K A050006 nonn,easy %O A050006 1,2 %A A050006 _Clark Kimberling_