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 A383331 #7 Apr 26 2025 11:27:47 %S A383331 2,3,7,16,37,91,229,585,1528,4034,10862 %N A383331 Number of pairs of nonnegative integers, not both equal to 0, with a shortest vectorial addition chain of length n. %C A383331 See A383330 for details. %Y A383331 Row 2 of A383333. %Y A383331 Cf. A003065, A383330, A383332. %K A383331 nonn,hard,more %O A383331 0,1 %A A383331 _Pontus von Brömssen_, Apr 26 2025