A027869 - OEIS

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A027869

Number of 0's in n!.

0, 0, 0, 0, 0, 1, 1, 2, 2, 1, 2, 2, 4, 4, 2, 4, 4, 4, 5, 6, 7, 7, 8, 5, 6, 9, 8, 9, 10, 7, 9, 7, 10, 8, 11, 9, 10, 12, 16, 12, 9, 15, 13, 13, 12, 13, 16, 11, 14, 14, 19, 18, 18, 17, 18, 18, 17, 20, 17 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,8`
	LINKS	`Index entries for sequences related to factorial numbers.`
	FORMULA	`a(n) = A034886(n) - (A079680(n) + A079714(n) + A079684(n) + A079688(n) + A079690(n) + A079691(n) + A079692(n) + A079693(n) + A079694(n)). - Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jan 27 2008` `A027868(n) <= a(n). - Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jan 27 2008`
	CROSSREFS	`Cf. A000142, A137579, A137580.` `Sequence in context: A070215 A071457 A115034 * A156748 A075445 A194447` `Adjacent sequences: A027866 A027867 A027868 * A027870 A027871 A027872`
	KEYWORD	`nonn,base`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`

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Last modified February 14 00:47 EST 2012. Contains 205567 sequences.