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

1, 18, 309, 5628, 110781, 2361222

Offset: 0

Author

N. J. A. Sloane, Jun 05 2013

Keywords

• nonn
• more

Links

• Adrian Ocneanu, On the inner structure of a permutation: bicolored partitions and Eulerians, trees and primitives, arXiv preprint arXiv:1304.1263 [math.CO], 2013.