A055968 - OEIS

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A055968

Product_{i=1..n} (i-1)!*(i+2*n-1)!/(i+n-1)!.

1, 2, 240, 16934400, 2433481408512000, 1702585913798082900787200000, 11371604489970305906683404111524659200000000, 1255487625657168098911809977092685237691748290920448000000000000 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	MAPLE	`A055968 := proc(n) local i; mul( (i-1)!(i+2n-1)!/(i+n-1)!, i=1..n); end;`
	CROSSREFS	`Sequence in context: A071967 A024348 A006523 * A074256 A146312 A109930` `Adjacent sequences: A055965 A055966 A055967 * A055969 A055970 A055971`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Jul 22 2000`

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Last modified February 17 19:13 EST 2012. Contains 206085 sequences.