id:A102759 - OEIS Search Results

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Number of partitions of n-set in which number of blocks of size 2k is even (or zero) for every k.

+0
9

1, 2, 8, 27, 82, 338, 1647, 7668, 37779, 210520, 1276662, 7985200, 51302500, 358798144, 2677814900, 20309850311, 160547934756, 1344197852830, 11666610870142, 104156661915427, 962681713955130, 9238216839975106 (list; graph; listen)

	OFFSET	`1,2`
	FORMULA	`E.g.f.: exp(sinh(x))Product_{k>0} cosh(x^(2k)/(2*k)!).`
	CROSSREFS	`Cf. A003483, A006950.` `Sequence in context: A087241 A092071 A100505 this_sequence A076884 A138388 A138386` `Adjacent sequences: A102756 A102757 A102758 this_sequence A102760 A102761 A102762`
	KEYWORD	`nonn`
	AUTHOR	`Vladeta Jovovic (vladeta(AT)eunet.rs), Feb 10 2005, Aug 05 2007`

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

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