id:A015018 - OEIS Search Results

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q-factorial numbers for q=-5.

+0
1

1, -4, -84, 8736, 4551456, -11851991424, -154324780331904, 10047160498728278016, 3270561732706527788046336, -5323179358400075453935368658944, -43320145405426340445710562789228109824 (list; graph; listen)

	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: A012189 A012076 A109901 this_sequence A059830 A116330 A055776` `Adjacent sequences: A015015 A015016 A015017 this_sequence A015019 A015020 A015021`
	KEYWORD	`sign,easy`
	AUTHOR	`Olivier Gerard (olivier.gerard(AT)gmail.com)`

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Last modified November 27 14:50 EST 2009. Contains 167570 sequences.

AT&T Labs Research