id:A051695 - OEIS Search Results

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Number of degree-n even permutations of order exactly 4.

+0
14

0, 0, 0, 0, 0, 90, 630, 3780, 18900, 94500, 457380, 3825360, 31505760, 312432120, 2704501800, 22984481520, 179863997040, 1531709328240 (list; graph; listen)

	OFFSET	`1,6`
	FORMULA	`a(n)=(A001473(n)+A051685(n))/2`
	CROSSREFS	`Cf. A048099.` `Sequence in context: A066116 A156738 A065949 this_sequence A097372 A101243 A124167` `Adjacent sequences: A051692 A051693 A051694 this_sequence A051696 A051697 A051698`
	KEYWORD	`easy,nonn`
	AUTHOR	`Vladeta Jovovic (vladeta(AT)eunet.rs)`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

AT&T Labs Research