A051628 - OEIS

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A051628

Number of digits in decimal expansion of 1/n before the periodic part begins.

0, 1, 0, 2, 1, 1, 0, 3, 0, 1, 0, 2, 0, 1, 1, 4, 0, 1, 0, 2, 0, 1, 0, 3, 2, 1, 0, 2, 0, 1, 0, 5, 0, 1, 1, 2, 0, 1, 0, 3, 0, 1, 0, 2, 1, 1, 0, 4, 0, 2, 0, 2, 0, 1, 1, 3, 0, 1, 0, 2, 0, 1, 0, 6, 1, 1, 0, 2, 0, 1, 0, 3, 0, 1, 2, 2, 0, 1, 0, 4, 0, 1, 0, 2, 1, 1, 0, 3, 0, 1, 0, 2, 0, 1, 1, 5, 0, 1, 0, 2, 0, 1, 0, 3, 1 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,4`
	LINKS	`T. D. Noe, Table of n, a(n) for n=1..1000` `L. Lopes, POLYA problem` `Index entries for sequences related to decimal expansion of 1/n`
	FORMULA	`for n>1, a(n)=max(i, j) where n=2^i3^x5^j*... is the prime decomposition of n.`
	EXAMPLE	`1/8 = .1250000... so a(8)=3, 1/15 = .0666666..., so a(15)=1.`
	CROSSREFS	`Sequence in context: A110962 A065715 A180984 * A163540 A127967 A147602` `Adjacent sequences: A051625 A051626 A051627 * A051629 A051630 A051631`
	KEYWORD	`nonn,nice,easy,base`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`
	EXTENSIONS	`More terms from Michael Lugo (mlugo(AT)thelabelguy.com), Dec 22 1999` `More terms from Frank Adams-Watters (FrankTAW(AT)Netscape.net), May 05 2006`

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Last modified February 15 03:59 EST 2012. Contains 205694 sequences.