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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 (list; graph; refs; listen; history; text; internal format)
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: A177310 A140917 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 September 26 09:15 EDT 2021. Contains 347664 sequences. (Running on oeis4.)