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 A039732 #6 Jun 09 2023 21:28:43 %S A039732 1,1,2,3,3,4,5,6,7,9,9,10,9,12,14,15,15,17,18,19,20,21,22,24,25,24,25, %T A039732 27,30,32,33,34,35,36,39,40,39,42,41,42,47,48,48,49,52,55,50,51,53,56, %U A039732 57,62,63,63,66,67,69,66,67,72,75,77,78,77 %N A039732 a(n) = s(n+1)/2, s=A039731. %Y A039732 Cf. A039731. %K A039732 nonn %O A039732 1,3 %A A039732 _Clark Kimberling_