A360462 Number of permutations p of [n] such that |p(i+9) - p(i)| <> 9 for i in [n-9].

1, 1, 2, 6, 24, 120, 720, 5040, 40320, 362880, 3548160, 37054080, 416551680, 5050368000, 65944535040, 924630958080, 13873661706240, 221978587299840, 3774394191052800, 67494538767237120, 1276009602375352320, 25429720417085030400

Offset

0,3

Links

Table of n, a(n) for n=0..21.

Crossrefs

Column k=9 of A333706.

Cf. A000142.

Sequence in context: A152710 A152705 A152702 * A072133 A230232 A319551

Adjacent sequences: A360459 A360460 A360461 * A360463 A360464 A360465

Keyword

nonn

Author

Alois P. Heinz, Feb 07 2023

Status

approved