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A089846 Number of cycles in range [A014137(n-1)..A014138(n-1)] of permutation A089867/A089868. +0
3
1, 1, 2, 5, 13, 35, 100, 296, 903, 2857, 9274, 30852, 104784, 362108, 1269324, 4502624, 16130539, 58271303, 212001890, 776027286, 2855731796 (list; graph; listen)
OFFSET

0,3

COMMENT

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

LINKS

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

CROSSREFS

Sequence in context: A037247 A126221 A107086 this_sequence A131868 A000747 A046171

Adjacent sequences: A089843 A089844 A089845 this_sequence A089847 A089848 A089849

KEYWORD

nonn

AUTHOR

Antti Karttunen (His_Firstname.His_Surname(AT)iki.fi), Dec 20 2003

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Last modified July 26 13:41 EDT 2008. Contains 142293 sequences.


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