A225967 Number of permutations of [n] having exactly 6 strong fixed blocks.

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

Alois P. Heinz, Table of n, a(n) for n = 16..460

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

Adjacent sequences: A225964 A225965 A225966 * A225968 A225969 A225970

Keyword

nonn

Author

Alois P. Heinz, May 22 2013

Status

approved