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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
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OFFSET
1,2
LINKS
Table of n, a(n) for n=1..18.
CROSSREFS
Sequence in context:
A189859
A189569
A174701
*
A173845
A258216
A263748
Adjacent sequences:
A178845
A178846
A178847
*
A178849
A178850
A178851
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.)