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A089404 Number of cycles in range [A014137(n-1)..A014138(n-1)] of permutation A073286/A073287. 2
1, 1, 2, 4, 10, 26, 74, 222, 698, 2264, 7536, 25600, 88406, 309440, 1095354, 3914340, 14102324, 51165004, 186774368, 685495334, 2527957006 (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: A206464 A089429 A049143 * A006123 A006251 A049401

Adjacent sequences:  A089401 A089402 A089403 * A089405 A089406 A089407

KEYWORD

nonn

AUTHOR

Antti Karttunen, Nov 29 2003

STATUS

approved

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Last modified October 15 16:14 EDT 2018. Contains 316236 sequences. (Running on oeis4.)