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A178847 Number of permutations of 4..n+3 with no element divisible by an adjacent element. 0
1, 2, 6, 24, 72, 480, 2640, 23040, 128640, 1444320, 14549760, 159007680, 1556058240, 24239980800, 301025439360, 5305897094400, 63948561909120, 1139924740993920 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
Table of n, a(n) for n=1..18.
CROSSREFS
Sequence in context: A087645 A174700 A216158 * A173844 A107761 A147943
Adjacent sequences: A178844 A178845 A178846 * A178848 A178849 A178850
KEYWORD
nonn
AUTHOR
R. H. Hardin Jun 17 2010
STATUS
approved

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Last modified May 12 19:25 EDT 2024. Contains 372494 sequences. (Running on oeis4.)