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 A050126 #10 Jul 04 2021 14:00:30 %S A050126 1,2,3,4,6,7,8,9,11,12,14,15,17,18,19,20,21,23,24,26,27,28,29,30,31, %T A050126 33,34,37,38,39,41,42,43,45,46,48,50,51,52,55,56,57,58,59,61,63,64,65, %U A050126 66,69,70,71,72,74,75,77,78,79,80,82,83,86 %N A050126 Numbers k such that A050124(k) < A050124(k+1). %K A050126 nonn %O A050126 1,2 %A A050126 _Clark Kimberling_