A179959 Number of permutations of 1..n with no adjacent elements within 5 in value.

1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 352, 24440, 1019616, 33461568, 957913824, 25415753280, 649347224736, 16370397635328

Offset

0,13

Links

Table of n, a(n) for n=0..20.

Crossrefs

Sequence in context: A216356 A064023 A370483 * A024350 A012669 A278926

Adjacent sequences: A179956 A179957 A179958 * A179960 A179961 A179962

Keyword

nonn

Author

R. H. Hardin, Aug 03 2010

Extensions

a(0)-a(10), a(20) from Alois P. Heinz, Oct 27 2014

Status

approved