A015015 - OEIS

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A015015

q-factorial numbers for q=-3.

1, -2, -14, 280, 17080, -3108560, -1700382320, 2788627004800, 13722833490620800, -202576467988544249600, -8971504037808659182035200, 1191954026463258458925196672000, 475090227821752019816863814722432000 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	LINKS	`Index entries for sequences related to factorial numbers`
	FORMULA	`prod_{k=1}^{k=n} {(q^k - 1) / (q - 1)}`
	CROSSREFS	`Sequence in context: A156910 A018803 A132695 * A128087 A139225 A078675` `Adjacent sequences: A015012 A015013 A015014 * A015016 A015017 A015018`
	KEYWORD	`sign,easy`
	AUTHOR	`Olivier Gerard (olivier.gerard(AT)gmail.com)`

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Last modified February 16 13:12 EST 2012. Contains 205909 sequences.