id:A073306 - OEIS Search Results

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Product_{2i<n} binomial(2*n-2*i-1,2*i).

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1, 1, 1, 3, 10, 105, 1260, 48510, 2162160, 312161850, 52562109600, 28836887379300, 18539497049673600, 38989721014029185400, 96410946507417622080000, 782067521015701609508820000 (list; graph; listen)

	OFFSET	`0,4`
	PROGRAM	`(PARI) a(n)=prod(i=0, (n-1)\2, binomial(2n-2i-1, 2*i))`
	CROSSREFS	`a(n)=A055068(n, n).` `Sequence in context: A091342 A093454 A048531 this_sequence A034945 A132480 A074260` `Adjacent sequences: A073303 A073304 A073305 this_sequence A073307 A073308 A073309`
	KEYWORD	`nonn,easy`
	AUTHOR	`Michael Somos, Jul 24, 2002`

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Last modified December 7 08:40 EST 2009. Contains 170430 sequences.

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