A225966 Number of permutations of [n] having exactly 5 strong fixed blocks.

1, 17, 187, 1725, 14770, 123810, 1049683, 9201893, 84765839, 830632443, 8737884632, 99283914256, 1222304625766, 16308650537598, 235329993989098, 3658770788460622, 61010416134839892, 1085940325012439060, 20537758641146194266, 410995800089222969774

Offset: 13

Author

Alois P. Heinz, May 22 2013

Keywords

• nonn

Comments

See A186373 for the definition of strong fixed blocks.

Links

• Alois P. Heinz, Table of n, a(n) for n = 13..450

Crossrefs

Column k=5 of A186373.

Formula

a(n) ~ 4 * n! / n^11. - Vaclav Kotesovec, Aug 29 2014