A069152 - OEIS

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A069152

a(n)=(n-1)!-n^tau(n)/n^2.

0, 1, 2, 23, 84, 719, 4976, 40311, 362780, 3628799, 39896064, 479001599, 6227020604, 87178290975, 1307674363904, 20922789887999, 355687427991024, 6402373705727999, 121645100408672000, 2432902008176639559 (list; graph; refs; listen; history; internal format)

	OFFSET	`2,3`
	COMMENTS	`n and a(n) have the same parity.`
	CROSSREFS	`Cf. A062758.` `Sequence in context: A042679 A097232 A099134 * A131464 A053999 A131176` `Adjacent sequences: A069149 A069150 A069151 * A069153 A069154 A069155`
	KEYWORD	`easy,nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Apr 08 2002`

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Last modified February 17 00:09 EST 2012. Contains 205978 sequences.