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A177314 Number of permutations of 9 copies of 1..n with all adjacent differences <= 2 in absolute value. 0
1, 1, 48620, 227873431500, 66341857216154520, 10150867545062935511900 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,3
COMMENTS
a(n) = (9n)!/362880^n for n<=3.
LINKS
CROSSREFS
Cf. A172613.
Sequence in context: A177313 A140924 A351488 * A177315 A172613 A172554
KEYWORD
nonn
AUTHOR
R. H. Hardin, May 06 2010
STATUS
approved

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Last modified February 24 01:16 EST 2024. Contains 370288 sequences. (Running on oeis4.)