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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
OFFSET
0,5
EXAMPLE
a(3) = 1: (13)(2).
a(4) = 4: (124)(3), (142)(3), (13)(2)(4), (14)(2)(3).
CROSSREFS
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Jul 17 2023
STATUS
approved