A179964 Number of permutations of 1..2*n+6 with no adjacent elements within n in value.

720, 5242, 44304, 399848, 3661824, 33461568, 305193408, 2779045440

Offset

0,1

Links

Table of n, a(n) for n=0..7.

Crossrefs

Sequence in context: A179728 A052799 A229569 * A153760 A029574 A119540

Adjacent sequences: A179961 A179962 A179963 * A179965 A179966 A179967

Keyword

nonn,more

Author

R. H. Hardin, Aug 03 2010

Extensions

a(0)=720 prepended by Seiichi Manyama, Dec 01 2018

Status

approved