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A180893
Number of permutations of 5..n+4 with no element greater than or equal to the sum of its neighbors
0
1, 0, 2, 6, 30, 180, 1200, 8988, 72984, 652062, 6265640, 65368816, 728437140, 8716755900, 110651859874, 1495439437896, 21314983075714, 321259346944130
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OFFSET
1,3
LINKS
Table of n, a(n) for n=1..18.
CROSSREFS
Sequence in context:
A127115
A290354
A293906
*
A180894
A180895
A180896
Adjacent sequences:
A180890
A180891
A180892
*
A180894
A180895
A180896
KEYWORD
nonn
AUTHOR
R. H. Hardin
Sep 23 2010
STATUS
approved
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Last modified March 29 07:27 EDT 2024. Contains 371265 sequences. (Running on oeis4.)