id:A072417 - OEIS Search Results

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a(n) = smallest positive m such that m! contains exactly n 0's, or 0 if no such m exists.

+0
2

1, 5, 7, 0, 12, 18, 19, 20, 22, 25, 28, 34, 37, 42, 48, 41, 38, 53, 51, 50, 57, 63, 67, 66, 76, 68, 61, 80, 82, 79, 83, 0, 77, 104, 89, 73, 85, 94, 110, 109, 118, 108, 107, 0, 116, 105, 131, 114, 129, 137, 128, 115, 122, 124, 127, 0, 134, 135, 144, 159, 140 (list; graph; listen)

	OFFSET	`0,2`
	EXAMPLE	`a(1)=5: 5!=120, which has only 1 zero. Other numbers with only 1 zero are 6 and 9.` `a(2)=7 since 7-th factorial i.e. 7!=5040 contains exactly two 0's.` `a(3)=0 since no factorial contained just three zeros.`
	CROSSREFS	`Cf. A072419.` `Sequence in context: A019669 A088394 A021950 this_sequence A133412 A111833 A011378`
	KEYWORD	`base,nonn`
	AUTHOR	`Shyam Sunder Gupta (guptass(AT)rediffmail.com), Jul 31 2002`
	EXTENSIONS	`Edited by njas, Sep 06 2008 at the suggestion of R. J. Mathar`

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Last modified October 7 08:31 EDT 2008. Contains 144667 sequences.

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