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 A050011 #10 Jul 04 2021 13:39:03 %S A050011 2,4,5,6,9,11,12,13,14,16,17,19,20,21,22,24,25,26,28,30,31,32,34,35, %T A050011 36,38,41,43,44,45,46,47,48,49,51,53,55,56,57,58,60,61,62,63,65,66,68, %U A050011 69,71,72,73,75,76,78,79,81,82,83,84,85,87 %N A050011 Numbers k such that A050008(k) > A050008(k+1). %K A050011 nonn,easy %O A050011 1,1 %A A050011 _Clark Kimberling_