id:A091371 - OEIS Search Results

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(Smallest prime factor of n) - (number of prime factors of n).

+0
7

1, 1, 2, 0, 4, 0, 6, -1, 1, 0, 10, -1, 12, 0, 1, -2, 16, -1, 18, -1, 1, 0, 22, -2, 3, 0, 0, -1, 28, -1, 30, -3, 1, 0, 3, -2, 36, 0, 1, -2, 40, -1, 42, -1, 0, 0, 46, -3, 5, -1, 1, -1, 52, -2, 3, -2, 1, 0, 58, -2, 60, 0, 0, -4, 3, -1, 66, -1, 1, -1, 70, -3, 72, 0, 0, -1, 5, -1, 78, -3 (list; graph; listen)

	OFFSET	`1,3`
	COMMENT	`a(n) = A020639(n) - A001222(n);` `a(A091375(n)) < 0; a(A091376(n)) = 0; a(A091377(n)) > 0.`
	CROSSREFS	`Cf. A091372, A091373, A091374.` `Adjacent sequences: A091368 A091369 A091370 this_sequence A091372 A091373 A091374` `Sequence in context: A071648 A001613 A130891 this_sequence A046666 A131575 A077957`
	KEYWORD	`sign`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jan 04 2004`

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Last modified October 13 09:05 EDT 2008. Contains 145008 sequences.

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