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A178848 Number of permutations of 5..n+4 with no element divisible by an adjacent element. 0
1, 2, 6, 24, 120, 480, 3600, 23040, 221760, 1895040, 17942400, 195229440, 2726760960, 29650279680, 479288355840, 6120338273280, 99262251970560, 1726003206789120 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
CROSSREFS
Sequence in context: A189859 A189569 A174701 * A173845 A258216 A263748
KEYWORD
nonn
AUTHOR
R. H. Hardin Jun 17 2010
STATUS
approved

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Last modified March 19 04:58 EDT 2024. Contains 370952 sequences. (Running on oeis4.)