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A259785
Number of permutations p of [2n] with no fixed points where the maximal displacement of an element equals n.
1
1, 1, 3, 44, 1285, 59963, 4113244, 389384029, 48627012403, 7743988554848, 1531612782695209, 368303149768896363, 105818590347793426632
OFFSET
0,3
FORMULA
a(n) = A259784(2n,n).
EXAMPLE
a(0) = 1: (the empty permutation).
a(1) = 1: 21.
a(2) = 3: 2413, 3142, 3412.
a(3) = 44: 214563, 215643, 216345, ..., 451623, 452163, 456123.
CROSSREFS
Cf. A259784.
Sequence in context: A359631 A011916 A337249 * A369944 A193623 A102811
KEYWORD
nonn,more
AUTHOR
Alois P. Heinz, Jul 05 2015
STATUS
approved