id:A051801 - OEIS Search Results

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Product of nonzero digits of n.

+0
12

1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 2, 2, 4, 6, 8, 10, 12, 14, 16, 18, 3, 3, 6, 9, 12, 15, 18, 21, 24, 27, 4, 4, 8, 12, 16, 20, 24, 28, 32, 36, 5, 5, 10, 15, 20, 25, 30, 35, 40, 45, 6, 6, 12, 18, 24, 30, 36, 42, 48, 54, 7, 7, 14 (list; graph; listen)

	OFFSET	`0,3`
	LINKS	`Zak Seidov, Table of n, a(n) for n = 0..1000.`
	FORMULA	`a(n) = if n=0 then 1 else a([n/10]) * (n mod 10 + 0^(n mod 10)). [From Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Oct 13 2009]`
	EXAMPLE	`a(0) = 1 since an empty product is 1 by convention. a(120) = 1*2 = 2.`
	CROSSREFS	`Basis for A051802.` `Sequence in context: A067456 A052429 A051802 this_sequence A071205 A066750 A032762` `Adjacent sequences: A051798 A051799 A051800 this_sequence A051802 A051803 A051804`
	KEYWORD	`nonn,easy,base,nice`
	AUTHOR	`Dan Hoey (Hoey(AT)AIC.NRL.Navy.Mil), Dec 09 1999`

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.

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