The On-Line Encyclopedia of Integer Sequences (OEIS)

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A073191

Number of separate orbits/cycles to which the Catalan bijections A072796/A072797 partition each A000108(n) structures encoded in the range [A014137(n-1)..A014138(n-1)] of the sequence A014486/A063171.
(history; published version)

#3 by N. J. A. Sloane at Sat Oct 17 08:36:23 EDT 2015

NAME

Number of separate orbits/cycles to which the gatomorphisms Catalan bijections A072796/A072797 partition each A000108(n) structures encoded in the range [A014137(n-1)..A014138(n-1)] of the sequence A014486/A063171.

Discussion

Sat Oct 17

08:36

OEIS Server: https://oeis.org/edit/global/2470

#2 by Charles R Greathouse IV at Thu May 01 02:47:43 EDT 2014

AUTHOR

_Antti Karttunen _, Jun 25 2002

Discussion

Thu May 01

02:47

OEIS Server: https://oeis.org/edit/global/2208

#1 by N. J. A. Sloane at Fri May 16 03:00:00 EDT 2003

NAME

Number of separate orbits/cycles to which the gatomorphisms A072796/A072797 partition each A000108(n) structures encoded in the range [A014137(n-1)..A014138(n-1)] of the sequence A014486/A063171.

DATA

1, 1, 2, 4, 11, 31, 96, 305, 1007, 3389, 11636, 40498, 142714, 507870, 1823040, 6591885, 23989419, 87795473, 322922652, 1193058230, 4425547638, 16475756738, 61539293424, 230548633954, 866095934598, 3261868457698, 12313423931624

OFFSET

0,3

FORMULA

a(n) = (A000108(n)+A073190(n))/2.

CROSSREFS

Occurs for first time in A073201 as row 1.

KEYWORD

nonn

AUTHOR

Antti Karttunen Jun 25 2002

STATUS

approved