id:A038802 - OEIS Search Results

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Factor 2n+1 = (2^m1)*(3^m2)*(5^m3)*...; a(n) = number of initial zero exponents.

+0
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1, 2, 3, 1, 4, 5, 1, 6, 7, 1, 8, 2, 1, 9, 10, 1, 2, 11, 1, 12, 13, 1, 14, 3, 1, 15, 2, 1, 16, 17, 1, 2, 18, 1, 19, 20, 1, 3, 21, 1, 22, 2, 1, 23, 3, 1, 2, 24, 1, 25, 26, 1, 27, 28, 1, 29, 2, 1, 3, 4, 1, 2, 30, 1, 31, 3, 1, 32, 3, 3, 1, 4, 2, 1, 34, 35, 1, 2, 36, 1, 3, 37, 1, 38, 5, 1, 39, 2, 1, 40 (list; graph; listen)

	OFFSET	`1,2`
	EXAMPLE	`9 = (2^0)*(3^2), thus a(4) = 1.`
	CROSSREFS	`Sequence in context: A055446 A104706 A094137 this_sequence A092942 A131225 A137671` `Adjacent sequences: A038799 A038800 A038801 this_sequence A038803 A038804 A038805`
	KEYWORD	`nonn`
	AUTHOR	`Thomas Kellar (tkellar(AT)fsp.com)`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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