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 A080969 #5 Jan 11 2024 10:54:51 %S A080969 2,2,2,6,6,6,6,6,6,2,2,6,6,6,3,6,6,6,6,6,6,6,6,6,6,6,6,6,3,6,6,6,3,6, %T A080969 6,6,6,6,2,2,6,6,6,6,6,6,6,6,6,6,20,6,6,6,6,6,6,6,6,6,6,6,6,20,2,6,6, %U A080969 6,20,20,6,6,6,6,6,20,6,6,20,6,20,6,6,20,20,6,20,6,6,6,20,20,6,6,20,20,6,20 %N A080969 Orbit size of each non-branch-reduced tree encoded by A080971(n) under Donaghey's "Map M" Catalan automorphism. %C A080969 This is the size of the cycle containing A080970(n) in the permutations A057505/A057506. %F A080969 a(n) = A080967(A080970(n)) %Y A080969 Cf. A080968, A080972. %K A080969 nonn %O A080969 0,1 %A A080969 _Antti Karttunen_, Mar 02 2003