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A089846 Number of cycles in range [A014137(n-1)..A014138(n-1)] of permutation A089867/A089868. 3
1, 1, 2, 5, 13, 35, 100, 296, 903, 2857, 9274, 30852, 104784, 362108, 1269324, 4502624, 16130539, 58271303, 212001890, 776027286, 2855731796 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

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

LINKS

Table of n, a(n) for n=0..20.

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

CROSSREFS

Sequence in context: A107086 A294790 A234643 * A258450 A131868 A272064

Adjacent sequences:  A089843 A089844 A089845 * A089847 A089848 A089849

KEYWORD

nonn

AUTHOR

Antti Karttunen, Dec 20 2003

STATUS

approved

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Last modified May 20 20:16 EDT 2019. Contains 323426 sequences. (Running on oeis4.)