id:A115278 - OEIS Search Results

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Number of partitions of {1,...,2*n} into even sized blocks such that no block size is repeated.

+0
2

1, 1, 1, 16, 29, 256, 14422, 49141, 490429, 10758400, 1797335306, 9458619391, 133756636598, 2528529510391, 137864810180749, 53441183229799381, 410251032050409469, 7615997734377068128, 167055180095977694194 (list; graph; listen)

	OFFSET	`0,4`
	FORMULA	`E.g.f.: B(x) of b(n) where b(2n)=a(n), b(2n+1)=0. B(x)=Product {m >= 1} (1+x^(2m)/(2m)!).`
	CROSSREFS	`Cf. A005046, A007837, A032310, A115277.` `Sequence in context: A104010 A064803 A054314 this_sequence A064634 A129617 A064816` `Adjacent sequences: A115275 A115276 A115277 this_sequence A115279 A115280 A115281`
	KEYWORD	`nonn`
	AUTHOR	`Christian G. Bower (bowerc(AT)usa.net), Jan 18 2006`

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Last modified September 8 08:06 EDT 2008. Contains 143486 sequences.

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