id:A112758 - OEIS Search Results

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Number of distinct prime factors of n-th 5-smooth number.

+0
4

0, 1, 1, 1, 1, 2, 1, 1, 2, 2, 2, 1, 2, 2, 2, 1, 1, 3, 1, 2, 2, 2, 2, 2, 2, 3, 1, 2, 2, 2, 1, 3, 2, 2, 2, 3, 1, 1, 2, 2, 3, 2, 2, 3, 2, 2, 2, 2, 3, 1, 2, 1, 3, 2, 3, 2, 2, 3, 2, 2, 2, 2, 2, 3, 3, 2, 2, 1, 3, 2, 3, 1, 2, 2, 2, 3, 1, 3, 2, 2, 3, 2, 3, 3, 2, 2, 1, 3, 2, 2, 3, 2, 2, 2, 2, 3, 3, 2, 3, 2, 2, 3, 2, 3, 2 (list; graph; listen)

	OFFSET	`1,6`
	COMMENT	`a(n) = A001221(A051037(n));` `a(n) = 3 - 0^A112760(n) - 0^A112761(n) - 0^A112762(n);` `a(n) <= 3.`
	CROSSREFS	`Cf. A112759, A112753, A086412.` `Sequence in context: A102418 A106032 A003646 this_sequence A029437 A131335 A046081` `Adjacent sequences: A112755 A112756 A112757 this_sequence A112759 A112760 A112761`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Sep 18 2005`

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Last modified March 20 09:10 EDT 2010. Contains 173642 sequences.

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