id:A165970 - OEIS Search Results

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sqrt( superfactorial(4n) / factorial(2n) )

+0
2

1, 12, 14515200, 420505587390873600000, 6848282921689337839624757371207680000000000, 592617982969061328644755583860005865281724398591341934673920000000000000000 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`a(n) = sqrt( A000178(4n) / A000142(2n) ) = sqrt(0! * 1! * ... * (2n-1)! * (2n+1)! * (2n+2)! * ... * (4n)!)`
	CROSSREFS	`Sequence in context: A116233 A145745 A144546 this_sequence A081357 A127708 A094896` `Adjacent sequences: A165967 A165968 A165969 this_sequence A165971 A165972 A165973`
	KEYWORD	`nonn`
	AUTHOR	`Max Alekseyev (maxale(AT)gmail.com), Oct 02 2009`

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

AT&T Labs Research