A179960 Number of permutations of 1..n with no adjacent elements within 6 in value.

1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 768, 98408, 6433728, 305193408, 11902581120, 412583686272

Offset

0,15

Links

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

Crossrefs

Sequence in context: A247080 A145124 A102969 * A344663 A167448 A320481

Adjacent sequences: A179957 A179958 A179959 * A179961 A179962 A179963

Keyword

nonn

Author

R. H. Hardin, Aug 03 2010

Extensions

a(0)-a(12), a(20) from Alois P. Heinz, Dec 01 2018

Status

approved