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 A080977 #6 Jan 11 2024 10:57:53 %S A080977 1,1,6,2,14,14,22,22,18,18,46,46,62,62,26,26 %N A080977 a(n) = A080272(2*n)/A080292(n). %C A080977 This gives the orbit size (under the Catalan bijection A057505) for every other binomial-mod-2 tree A080263(2*n) divided by the orbit size of the corresponding branch-reduced tree A080293(n). See comment at A080972. %K A080977 nonn,more %O A080977 0,3 %A A080977 _Antti Karttunen_, Mar 02 2003