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A120707 Number of cycles in range [A014137(n-1)..A014138(n-1)] of permutation A120705/A120706. 2
1, 1, 1, 2, 3, 6, 10, 20, 39, 72, 138, 286, 512 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

COMMENTS

The number of orbits to which the corresponding automorphisms partition the set of A000108(n) binary trees of n internal nodes.

LINKS

Table of n, a(n) for n=0..12.

CROSSREFS

Sequence in context: A005195 A228835 A052843 * A047111 A106741 A068991

Adjacent sequences:  A120704 A120705 A120706 * A120708 A120709 A120710

KEYWORD

nonn

AUTHOR

Antti Karttunen, Jun 28 2006

STATUS

approved

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Last modified October 20 04:07 EDT 2014. Contains 248329 sequences.