A179963 Number of permutations of 1..2*n+5 with no adjacent elements within n in value.

120, 646, 3984, 25384, 161136, 1019616, 6433728, 40495488, 254319360, 1593945600

Offset

0,1

Links

Table of n, a(n) for n=0..9.

Crossrefs

Sequence in context: A265041 A280425 A235768 * A229568 A342923 A292365

Adjacent sequences: A179960 A179961 A179962 * A179964 A179965 A179966

Keyword

nonn,more

Author

R. H. Hardin, Aug 03 2010

Extensions

a(0)=120 prepended by Seiichi Manyama, Dec 01 2018

Status

approved