A098695 - OEIS

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A098695

2^[n(n-1)/2] * Prod[k=1..n, k! ].

1, 1, 4, 96, 18432, 35389440, 815372697600, 263006617337856000, 1357366631815981301760000, 126095668058466123464363212800000, 234278891648287676839670388023623680000000 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,3`
	LINKS	`C. Radoux, Determinants de Hankel et theoreme de Sylvester`
	CROSSREFS	`Equals A006125 * A000178.` `Contribution from Johannes W. Meijer (meijgia(AT)hotmail.com), Feb 20 2009: (Start)` `Equals the absolute values of the row sums of A156921.` `(End)` `Sequence in context: A203517 A146514 A181335 * A059201 A027638 A041275` `Adjacent sequences: A098692 A098693 A098694 * A098696 A098697 A098698`
	KEYWORD	`nonn`
	AUTHOR	`Ralf Stephan, Sep 22 2004`
	EXTENSIONS	`I have added a(0)=1. The formula 2^[n(n-1)/2] * Prod[k=1..n, k! ] permits this. Furthermore this is in accordance with the statement: Equals A006125 * A000178. The offset should accordingly be changed to 0. Johannes W. Meijer (meijgia(AT)hotmail.com), Feb 20 2009` `Offset changed to 0 and second offset to 3 Johannes W. Meijer (meijgia(AT)hotmail.com), Feb 23 2009`

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Last modified February 18 00:14 EST 2012. Contains 206085 sequences.