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A177306 Number of permutations of 6 copies of 1..n with all adjacent differences <= 3 in absolute value. 0
1, 1, 924, 17153136, 2308743493056, 71614356453896256, 1097239851330486263400 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

a(n) = (6n)!/720^n for n<=4.

LINKS

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

CROSSREFS

Cf. A248814.

Sequence in context: A140906 A179715 A177305 * A248814 A172558 A229778

Adjacent sequences:  A177303 A177304 A177305 * A177307 A177308 A177309

KEYWORD

nonn

AUTHOR

R. H. Hardin, May 06 2010

STATUS

approved

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Last modified December 3 05:05 EST 2021. Contains 349445 sequences. (Running on oeis4.)