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 A080273 #5 Jan 11 2024 10:24:55 %S A080273 1,3,16,1441,41888,3376173 %N A080273 Orbit size of each tree A080263(n) under Meeussen's bf<->df map on binary trees. %C A080273 This is the size of the cycle containing A080265(n) in the permutations A057117/A057118. %F A080273 a(n) = A080311(A080265(n)). %Y A080273 Cf. A080274, A080297. %K A080273 nonn,more %O A080273 0,2 %A A080273 _Antti Karttunen_, Mar 02 2003