A097660 - OEIS

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A097660

Number of zeros in decimal representation of 1001^n.

0, 2, 4, 6, 8, 10, 10, 10, 12, 10, 12, 8, 8, 6, 18, 14, 10, 10, 8, 5, 12, 14, 9, 7, 10, 18, 14, 13, 15, 13, 15, 10, 14, 12, 17, 16, 17, 15, 13, 21, 24, 15, 9, 16, 12, 22, 20, 21, 20, 16, 19, 16, 21, 20, 25, 20, 20, 21, 26, 19, 20, 19, 22, 19, 17, 23, 28, 24, 22, 20, 27, 26, 25 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	COMMENTS	`a(n) = A055641(A097659(n)).`
	EXAMPLE	`a(2)=4, as A097659(1)=1001^2=1002001 contains four zeros.`
	MATHEMATICA	`DigitCount[#, 10, 0]&/@(1001^Range[0, 75]) (* From Harvey P. Dale, Apr 26 2011 *)`
	CROSSREFS	`Sequence in context: A061243 A079431 A081472 * A176995 A154809 A153170` `Adjacent sequences: A097657 A097658 A097659 * A097661 A097662 A097663`
	KEYWORD	`nonn,base`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Aug 18 2004`

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Last modified February 15 14:20 EST 2012. Contains 205811 sequences.