A259780 Number of permutations p of [n] with no fixed points and displacement of elements restricted by seven: 1 <= |p(i)-i| <= 7.

1, 0, 1, 2, 9, 44, 265, 1854, 14833, 101976, 619009, 3449752, 18376224, 96559908, 511111965, 2761247612, 15348014345, 86603917480, 491567055577, 2789697424330, 15773859067112, 88743605142976, 496953313619236, 2774429422110882, 15478834487896593

Offset: 0

Author

Alois P. Heinz, Jul 05 2015

Keywords

• nonn

Comments

Conjectured recurrence order is 1780. - Vaclav Kotesovec, Jul 07 2015

Links

• Alois P. Heinz, Table of n, a(n) for n = 0..1000

Crossrefs

Column k=7 of A259776.

Cf. A260091.