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A089424 Number of cycles in range [A014137(n-1)..A014138(n-1)] of permutation A082351/A082352. 0
1, 1, 2, 3, 6, 18, 48, 151, 478, 1580, 5304, 18220, 63308, 222936, 792436, 2841807, 10265130, 37322728, 136468200, 501523066, 1851418668 (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: A277703 A080338 A057581 * A083563 A038056 A072241

Adjacent sequences:  A089421 A089422 A089423 * A089425 A089426 A089427

KEYWORD

nonn

AUTHOR

Antti Karttunen, Nov 29 2003

STATUS

approved

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Last modified February 25 08:21 EST 2020. Contains 332221 sequences. (Running on oeis4.)