id:A122685 - OEIS Search Results

Search: id:A122685

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a(n) = n! except that a(2) = -2 and a(2n) = 0 for n > 2.

+0
1

1, 1, -2, 6, 0, 120, 0, 5040, 0, 362880, 0, 39916800, 0, 6227020800, 0, 1307674368000, 0, 355687428096000, 0, 121645100408832000, 0, 51090942171709440000, 0, 25852016738884976640000, 0, 15511210043330985984000000, 0, 10888869450418352160768000000, 0, 8841761993739701954543616000000 (list; graph; listen)

	OFFSET	`0,3`
	CROSSREFS	`Adjacent sequences: A122682 A122683 A122684 this_sequence A122686 A122687 A122688` `Sequence in context: A139717 A138703 A106458 this_sequence A109581 A056876 A021797`
	KEYWORD	`sign`
	AUTHOR	`Paul Curtz (bpcrtz(AT)free.fr), Jul 28 2007`
	EXTENSIONS	`Edited by njas, Jul 29 2007`

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Last modified October 12 12:19 EDT 2008. Contains 144830 sequences.

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