A104320 - OEIS

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A104320

Number of zeros in ternary representation of 2^n.

0, 0, 0, 0, 0, 1, 1, 1, 2, 2, 1, 1, 1, 4, 1, 0, 4, 2, 3, 3, 3, 3, 3, 7, 7, 9, 5, 6, 6, 4, 4, 3, 5, 6, 7, 9, 9, 10, 6, 6, 9, 9, 8, 9, 8, 7, 13, 12, 13, 9, 5, 9, 8, 6, 16, 13, 9, 10, 11, 11, 7, 14, 13, 13, 9, 12, 14, 15, 15, 11, 11, 17, 15, 19, 14, 19, 12, 18, 15, 11, 10, 16, 15, 14, 14, 13, 17, 14 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,9`
	COMMENTS	`a(n) = A077267(A000079(n));` `a(A104321(n))=n and a(m)<>n for m < A104321(n);` `N. J. A. Sloane (njas(AT)research.att.com) conjectures a(n)>0 for n>15, see A102483.`
	EXAMPLE	`n=13: 2^13=8192 -> '102020102', a(13) = 4.`
	CROSSREFS	`Cf. A004642, A007089.` `Sequence in context: A201881 A140751 A162741 * A180264 A128706 A090737` `Adjacent sequences: A104317 A104318 A104319 * A104321 A104322 A104323`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Mar 01 2005`

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Last modified February 17 14:50 EST 2012. Contains 206050 sequences.