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 A080274 #5 Jan 11 2024 09:40:39 %S A080274 1,1,3,202,1582608 %N A080274 Orbit size of each complete binary tree under Meeussen's bf<->df map on binary trees. %Y A080274 Cf. A080311, A080273. %K A080274 nonn,more %O A080274 0,3 %A A080274 _Antti Karttunen_, Mar 02 2003