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A225970
Number of permutations of [n] having exactly 9 strong fixed blocks.
2
1, 33, 627, 9073, 111870, 1248766, 13110889, 132972135, 1329550237, 13327791693, 135953350084, 1431074091372, 15754008527799, 183668908342603, 2292564722628641, 30882981325870191, 450836857113720902, 7132752605955632598, 121911367111794972727
OFFSET
25,2
COMMENTS
See A186373 for the definition of strong fixed blocks.
LINKS
FORMULA
a(n) ~ 8 * n! / n^23. - Vaclav Kotesovec, Aug 29 2014
CROSSREFS
Column k=9 of A186373.
Sequence in context: A076684 A181382 A252926 * A004328 A235894 A261486
KEYWORD
nonn
AUTHOR
Alois P. Heinz, May 22 2013
STATUS
approved