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 A026265 #6 Jul 31 2023 13:52:50 %S A026265 1,2,3,4,7,5,6,8,9,11,13,16,17,18,10,12,14,15,23,24,25,26,28,31,19,20, %T A026265 21,22,34,36,39,40,41,27,29,30,32,46,47,48,49,51,54,33,35,37,38,58,60, %U A026265 62,63,64,42,43,44,45,69,70,71,73,75,78,50 %N A026265 a(n) = position of n in A026264. %Y A026265 Cf. A026264. %K A026265 nonn %O A026265 1,2 %A A026265 _Clark Kimberling_