id:A015013 - OEIS Search Results

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q-factorial numbers for q=-2.

+0
1

1, -1, -3, 15, 165, -3465, -148995, 12664575, 2165642325, -738484032825, -504384594419475, 688484971382583375, 1880252456845835197125, -10268058666835106011499625, -112158004817839862963610403875 (list; graph; listen)

	OFFSET	`1,3`
	LINKS	`Index entries for sequences related to factorial numbers`
	FORMULA	`prod_{k=1}^{k=n} {(q^k - 1) / (q - 1)}`
	CROSSREFS	`Adjacent sequences: A015010 A015011 A015012 this_sequence A015014 A015015 A015016` `Sequence in context: A108975 A097489 A080696 this_sequence A132683 A059386 A077792`
	KEYWORD	`sign,easy`
	AUTHOR	`Olivier Gerard (olivier.gerard(AT)gmail.com)`

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Last modified October 11 13:47 EDT 2008. Contains 144830 sequences.

AT&T Labs Research