A090617 - OEIS

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A090617

Highest power of 8 dividing n!.

0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 5, 5, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 8, 10, 10, 10, 10, 11, 11, 11, 11, 12, 12, 13, 13, 13, 13, 14, 14, 15, 15, 15, 15, 16, 16, 16, 16, 17, 17, 18, 18, 18, 18, 19, 19, 21, 21, 21, 21, 22, 22, 22, 22, 23, 23, 23, 23, 24, 24, 24, 24 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,9`
	FORMULA	`a(n) =A090622(n, 8) =[A011371(n)/3] =[([n/2]+[n/4]+[n/8]+[n/16]+...)/3].`
	EXAMPLE	`a(8)=2 since 8!=40320=8^2*630.`
	CROSSREFS	`Cf. A011371, A054861, A090616, A027868, A054896.` `Sequence in context: A070548 A132011 A054893 * A053693 A068063 A087181` `Adjacent sequences: A090614 A090615 A090616 * A090618 A090619 A090620`
	KEYWORD	`nonn`
	AUTHOR	`Henry Bottomley (se16(AT)btinternet.com), Dec 06 2003`

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Last modified February 15 17:13 EST 2012. Contains 205828 sequences.