A179341 Number of permutations of 1..n with i-6<=p(i)<=i+3.

1, 2, 6, 24, 96, 384, 1536, 5658, 20266, 72955, 268381, 994512, 3686128, 13633620, 50340576, 185671416, 684550020, 2524915648, 9317169000, 34387796485, 126912448549, 468345021626, 1728237116326, 6377253266492, 23532426206416

Offset

1,2

Links

R. H. Hardin, Table of n, a(n) for n = 1..400

Vaclav Kotesovec, G.f. for A179341

Formula

G.f.: see link above. - Vaclav Kotesovec, Dec 01 2012

Crossrefs

Sequence in context: A147930 A147918 A072855 * A179345 A179350 A179356

Adjacent sequences: A179338 A179339 A179340 * A179342 A179343 A179344

Keyword

nonn

Author

R. H. Hardin, Jul 11 2010

Status

approved