A178846 - OEIS

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A178846

Number of permutations of 3..n+2 with no element divisible by an adjacent element.

1, 2, 6, 12, 72, 336, 1824, 13152, 134880, 649296, 8572800, 102194400, 1033046880, 12143232960, 210042192960, 2372176649280, 46447968686400, 648516678024960 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,2`
	LINKS	`Table of n, a(n) for n=1..18.`
	CROSSREFS	`Sequence in context: A287142 A076220 A258213 * A173843 A107763 A166470` `Adjacent sequences: A178843 A178844 A178845 * A178847 A178848 A178849`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin Jun 17 2010`
	STATUS	`approved`

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Last modified February 27 05:37 EST 2021. Contains 341649 sequences. (Running on oeis4.)