A177309 - OEIS

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A177309

Number of permutations of 7 copies of 1..n with all adjacent differences <= 3 in absolute value.

1, 3432, 399072960, 472518347558400, 102038786510159790720, 9792481437399343532438160 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,2`
	COMMENTS	`a(n)=(7n)!/5040^n for n<=4`
	LINKS	`Table of n, a(n) for n=1..6.`
	CROSSREFS	`Sequence in context: A177307 A140911 A177308 * A172603 A172559 A172658` `Adjacent sequences: A177306 A177307 A177308 * A177310 A177311 A177312`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin May 06 2010`
	STATUS	`approved`

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Last modified May 21 17:10 EDT 2013. Contains 225504 sequences.