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A177315 Number of permutations of 9 copies of 1..n with all adjacent differences <= 3 in absolute value. 0
1, 1, 48620, 227873431500, 21452752266265320000, 230729955958244519983206000 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

a(n) = (9n)!/362880^n for n<=4.

LINKS

Table of n, a(n) for n=0..5.

CROSSREFS

Cf. A172613.

Sequence in context: A177313 A140924 A177314 * A172613 A172554 A244172

Adjacent sequences:  A177312 A177313 A177314 * A177316 A177317 A177318

KEYWORD

nonn

AUTHOR

R. H. Hardin, May 06 2010

STATUS

approved

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Last modified December 2 19:13 EST 2016. Contains 278683 sequences.