A225969 Number of permutations of [n] having exactly 8 strong fixed blocks.

1, 29, 493, 6484, 73713, 768931, 7641778, 74285193, 720732077, 7097087844, 71988257273, 762506830931, 8539944840752, 102230338451871, 1318698786618219, 18414090830686692, 278579895011969895, 4555101560023980405, 80136465741614450118, 1508615434533451340535

Offset: 22

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 = 22..460

Crossrefs

Column k=8 of A186373.

Formula

a(n) ~ 7 * n! / n^20. - Vaclav Kotesovec, Aug 29 2014