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A226297 Number of primitive permutations with n buds and 4 red or blue elements. 1
1, 12, 159, 2388, 40221, 751032 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..5.

Adrian Ocneanu, On the inner structure of a permutation: bicolored partitions and Eulerians, trees and primitives, arXiv preprint arXiv:1304.1263, 2013

CROSSREFS

Sequence in context: A269642 A269411 A347748 * A286721 A112719 A091019

Adjacent sequences:  A226294 A226295 A226296 * A226298 A226299 A226300

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Jun 05 2013

STATUS

approved

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Last modified October 21 15:14 EDT 2021. Contains 348155 sequences. (Running on oeis4.)