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A177312
Number of permutations of 8 copies of 1..n with all adjacent differences <= 3 in absolute value.
0
1, 1, 12870, 9465511770, 99561092450391000, 151158246783053570131500, 91756879673807945288868127380
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OFFSET
0,3
COMMENTS
a(n) = (8n)!/40320^n for n<=4.
LINKS
Table of n, a(n) for n=0..6.
CROSSREFS
Cf.
A172609
.
Sequence in context:
A140917
A351487
A177311
*
A172609
A172560
A031805
Adjacent sequences:
A177309
A177310
A177311
*
A177313
A177314
A177315
KEYWORD
nonn
AUTHOR
R. H. Hardin
, May 06 2010
STATUS
approved
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Last modified July 13 11:10 EDT 2024. Contains 374282 sequences. (Running on oeis4.)