login
The OEIS is supported by the many generous donors to the OEIS Foundation.
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
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 A370718 A318799
Adjacent sequences: A089402 A089403 A089404 * A089406 A089407 A089408
KEYWORD
nonn
AUTHOR
Antti Karttunen, Nov 29 2003
STATUS
approved

Lookup Welcome Wiki Register Music Plot 2 Demos Index WebCam Contribute Format Style Sheet Transforms Superseeker Recents
The OEIS Community
Maintained by The OEIS Foundation Inc.
Last modified November 15 16:22 EST 2024. Contains 377764 sequences.
License Agreements, Terms of Use, Privacy Policy