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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
CROSSREFS
Cf. A172609.
Sequence in context: A177310 A140917 A351487 * A177312 A172609 A172560
KEYWORD
nonn
AUTHOR
R. H. Hardin, May 06 2010
STATUS
approved

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Last modified April 13 09:16 EDT 2024. Contains 371640 sequences. (Running on oeis4.)