A226298 Number of primitive permutations with n buds and 5 red or blue elements.

1, 18, 309, 5628, 110781, 2361222

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: A170737 A091045 A179121 * A368537 A321511 A208537

Adjacent sequences: A226295 A226296 A226297 * A226299 A226300 A226301

Keyword

nonn,more

Author

N. J. A. Sloane, Jun 05 2013

Status

approved