A364277 - OEIS

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A364277

Number of permutations of [n] such that no cycle contains its length as an element.

5

1, 0, 0, 1, 4, 24, 138, 1032, 8160, 75600, 751680, 8436960, 100679040, 1327052160, 18525024000, 280451808000, 4477627123200, 76690072166400, 1377634946688000, 26328977260185600, 525869478021888000, 11092929741653760000, 243781091314016256000, 5628622656645660672000

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OFFSET

0,5

LINKS

Table of n, a(n) for n=0..23.

Wikipedia, Permutation

EXAMPLE

a(3) = 1: (13)(2).

a(4) = 4: (124)(3), (142)(3), (13)(2)(4), (14)(2)(3).

CROSSREFS

Cf. A362362, A363881, A364279, A364406.

Sequence in context: A153337 A122690 A183512 * A262376 A204199 A005319

Adjacent sequences: A364274 A364275 A364276 * A364278 A364279 A364280

KEYWORD

nonn

AUTHOR

Alois P. Heinz, Jul 17 2023

STATUS

approved