id:A033273 - OEIS Search Results

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Number of nonprime divisors of n.

+0
9

1, 1, 1, 2, 1, 2, 1, 3, 2, 2, 1, 4, 1, 2, 2, 4, 1, 4, 1, 4, 2, 2, 1, 6, 2, 2, 3, 4, 1, 5, 1, 5, 2, 2, 2, 7, 1, 2, 2, 6, 1, 5, 1, 4, 4, 2, 1, 8, 2, 4, 2, 4, 1, 6, 2, 6, 2, 2, 1, 9, 1, 2, 4, 6, 2, 5, 1, 4, 2, 5, 1, 10, 1, 2, 4, 4, 2, 5, 1, 8, 4, 2, 1, 9, 2, 2, 2, 6, 1, 9, 2, 4, 2, 2, 2, 10, 1, 4, 4, 7, 1 (list; graph; listen)

	OFFSET	`1,4`
	CROSSREFS	`a(n) = A000005(n) - A001221(n).` `Sequence in context: A039637 A069157 A076526 this_sequence A034836 A001055 A129138` `Adjacent sequences: A033270 A033271 A033272 this_sequence A033274 A033275 A033276`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`
	EXTENSIONS	`More terms from Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Sep 02 2003` `Corrected error in offset. - Jaroslav Krizek (jaroslav.krizek(AT)atlas.cz), May 04 2009`

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Last modified November 24 14:25 EST 2009. Contains 167438 sequences.

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