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 A050015 #7 Apr 21 2021 03:28:34 %S A050015 2,4,5,6,9,10,11,12,15,16,17,18,19,20,24,25,26,27,29,30,31,32,34,35, %T A050015 36,37,38,43,44,45,46,47,48,49,50,52,53,54,56,57,59,60,62,63,64,65,66, %U A050015 69,70,71,73,74,75,76,77,79,80,82,83,85,86 %N A050015 Numbers k such that b(k) > b(k+1), where b=A050012. %K A050015 nonn,easy %O A050015 1,1 %A A050015 _Clark Kimberling_