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A089405 Number of cycles in range [A014137(n-1)..A014138(n-1)] of permutation A073288/A073289. 0
1, 1, 2, 4, 9, 20, 47, 112, 279, 712, 1868, 5020, 13792, 38630, 110105, 318756, 935817, 2782424, 8368484, 25434314, 78047606 (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: A036620 A036721 A014267 * A091500 A052329 A199883

Adjacent sequences:  A089402 A089403 A089404 * A089406 A089407 A089408

KEYWORD

nonn

AUTHOR

Antti Karttunen, Nov 29 2003

STATUS

approved

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Last modified December 18 00:20 EST 2014. Contains 252040 sequences.