A089417 Number of cycles in range [A014137(n-1)..A014138(n-1)] of permutation A082333/A082334.

1, 1, 1, 2, 7, 6, 10, 20, 37, 70, 130, 272, 480, 954, 1750, 3462, 6481, 12922, 24372, 48702, 92490

Offset: 0

Author

Antti Karttunen, Nov 29 2003, Proposed by Wouter Meeussen, Spring 2003

Keywords

• nonn

Comments

The number of orbits to which the corresponding automorphism(s) partitions the set of A000108(n) binary trees with n internal nodes.

Is the non-monotone notch from a(4)=7 to a(5)=6 the only one?

Links

• A. Karttunen, C-program for computing the initial terms of this sequence

Crossrefs

Cf. A089411.