OFFSET
8,1
COMMENTS
A nontrivial cycle has size > 1.
LINKS
Alois P. Heinz, Table of n, a(n) for n = 8..450
Wikipedia, Permutation
FORMULA
E.g.f.: (log(1-x)+x)^4/4!*exp(x).
MATHEMATICA
Drop[Range[0, 30]! CoefficientList[Series[(Log[1 - x] + x)^4 / 4! Exp[x], {x, 0, 30}], x], 8] (* Vincenzo Librandi, Jul 23 2017 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Jul 16 2017
STATUS
approved