A226299 Number of primitive permutations with n buds and 6 red or blue elements.

1, 25, 540, 11760, 268365, 6495345

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 [math.CO], 2013.

Crossrefs

Sequence in context: A144942 A122140 A083191 * A264378 A015679 A230454

Adjacent sequences: A226296 A226297 A226298 * A226300 A226301 A226302

Keyword

nonn,more

Author

N. J. A. Sloane, Jun 05 2013

Status

approved