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 A026260 #6 Jun 26 2022 04:40:38 %S A026260 1,2,3,5,8,9,4,6,7,13,15,18,10,11,12,22,23,25,28,14,16,17,32,33,35,19, %T A026260 20,21,40,41,42,44,24,26,27,49,50,51,29,30,31,55,58,59,60,34,36,63,65, %U A026260 68,69,37,38,39,73,75,78,79,43,45,83,84,86 %N A026260 Position of n in A026259. %Y A026260 Cf. A026259. %K A026260 nonn %O A026260 1,2 %A A026260 _Clark Kimberling_