id:A130223 - OEIS Search Results

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Number of partitions of n-set in which number of blocks of size 2k-1 is odd (or zero) for every k.

+0
4

1, 1, 1, 5, 8, 42, 117, 541, 2403, 10485, 65778, 282262, 2284493, 9977853, 97315935, 450358629, 4966934284 (list; graph; listen)

	OFFSET	`0,4`
	FORMULA	`E.g.f.: exp(cosh(x)-1)Product_{k>0} (1+sinh(x^(2k-1)/(2*k-1)!)).`
	CROSSREFS	`Cf. A102759.` `Adjacent sequences: A130220 A130221 A130222 this_sequence A130224 A130225 A130226` `Sequence in context: A032790 A075273 A073930 this_sequence A126750 A109292 A117474`
	KEYWORD	`easy,more,nonn`
	AUTHOR	`Vladeta Jovovic (vladeta(AT)Eunet.yu), Aug 05 2007, Aug 05 2007`

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Last modified October 6 12:54 EDT 2008. Contains 144667 sequences.