id:A069352 - OEIS Search Results

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Total number of prime factors of 3-smooth numbers.

+0
10

0, 1, 1, 2, 2, 3, 2, 3, 4, 3, 4, 3, 5, 4, 5, 4, 6, 5, 4, 6, 5, 7, 6, 5, 7, 6, 5, 8, 7, 6, 8, 7, 6, 9, 8, 7, 6, 9, 8, 7, 10, 9, 8, 7, 10, 9, 8, 11, 7, 10, 9, 8, 11, 10, 9, 12, 8, 11, 10, 9, 12, 8, 11, 10, 13, 9, 12, 11, 10, 13, 9, 12, 11, 14, 10, 13, 9, 12, 11, 14, 10, 13, 12, 15, 11 (list; graph; listen)

	OFFSET	`1,4`
	COMMENT	`a(n) = A001222(A003586(n));` `a(n) = A022328(n) + A022329(n);` `A086414(n) <= A086415(n) <= a(n).`
	FORMULA	`a(n) = i+j for 3-smooth numbers n = 2^i*3^j (A003586).`
	CROSSREFS	`Sequence in context: A115727 A115726 A086413 this_sequence A073453 A123229 A127095` `Adjacent sequences: A069349 A069350 A069351 this_sequence A069353 A069354 A069355`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Mar 18 2002`
	EXTENSIONS	`Edited by N. J. A. Sloane (njas(AT)research.att.com), Oct 27 2008 at the suggestion of R. J. Mathar.`

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

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