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A177311 Number of permutations of 8 copies of 1..n with all adjacent differences <= 2 in absolute value. 0
1, 1, 12870, 9465511770, 580132098966420, 19840440079542390102, 1061489454895820193068774 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

a(n) = (8n)!/40320^n for n<=3.

LINKS

Table of n, a(n) for n=0..6.

CROSSREFS

Cf. A172609.

Sequence in context: A068359 A177310 A140917 * A177312 A172609 A172560

Adjacent sequences:  A177308 A177309 A177310 * A177312 A177313 A177314

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.)