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A180891
Number of permutations of 3..n+2 with no element greater than or equal to the sum of its neighbors
0
1, 0, 2, 6, 26, 142, 844, 5686, 42114, 349630, 3149222, 31070272, 328873208, 3760018560, 45762031978, 595413789074, 8190755202454, 119517943312606
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OFFSET
1,3
LINKS
Table of n, a(n) for n=1..18.
CROSSREFS
Sequence in context:
A134094
A009575
A263687
*
A224529
A171151
A177381
Adjacent sequences:
A180888
A180889
A180890
*
A180892
A180893
A180894
KEYWORD
nonn
AUTHOR
R. H. Hardin
Sep 23 2010
STATUS
approved
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Last modified April 24 00:30 EDT 2024. Contains 371917 sequences. (Running on oeis4.)