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A225967
Number of permutations of [n] having exactly 6 strong fixed blocks.
2
1, 21, 273, 2874, 27243, 246037, 2192863, 19766016, 183564396, 1782944112, 18338911012, 201770228316, 2392011321782, 30683876823738, 426312246308898, 6403885291569540, 103619141358704966, 1797448899803758010, 33259985875540203746, 653383741590779444772
OFFSET
16,2
COMMENTS
See A186373 for the definition of strong fixed blocks.
LINKS
FORMULA
a(n) ~ 5 * n! / n^14. - Vaclav Kotesovec, Aug 29 2014
CROSSREFS
Column k=6 of A186373.
Sequence in context: A228215 A032535 A022745 * A334529 A004324 A243421
KEYWORD
nonn
AUTHOR
Alois P. Heinz, May 22 2013
STATUS
approved