id:A157625 - OEIS Search Results

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Product of the composite numbers between n+1 and 2n, both inclusive.

+0
2

1, 4, 24, 48, 4320, 8640, 120960, 3628800, 7257600, 14515200, 6706022400, 13412044800, 8717829120000, 470762772480000, 941525544960000, 1883051089920000, 2112783322890240000, 147894832602316800000 (list; graph; listen)

	OFFSET	`1,2`
	PROGRAM	`(PARI) a(n)=prod(i=n+1, 2*n, if(isprime(i), 1, i))`
	CROSSREFS	`Cf. A073840, A157017.` `Sequence in context: A039935 A090821 A052645 this_sequence A128205 A085250 A166870` `Adjacent sequences: A157622 A157623 A157624 this_sequence A157626 A157627 A157628`
	KEYWORD	`nonn`
	AUTHOR	`Jaume Oliver Lafont (joliverlafont(AT)gmail.com), Mar 03 2009`

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Last modified December 16 17:18 EST 2009. Contains 170825 sequences.

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