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 A050022 #10 Jul 04 2021 13:42:39 %S A050022 1,4,5,12,15,20,21,22,30,36,40,44,48,50,51,52,64,69,72,78,79,87,88,95, %T A050022 99,100,106,110,115,118,124,128,132,138,141,145,150,152,159,163,164, %U A050022 170,174,178,182,188,191,196,200,204,211,215 %N A050022 Numbers k such that A050020(k) < A050020(k+1). %K A050022 nonn,easy %O A050022 1,2 %A A050022 _Clark Kimberling_