id:A080773 - OEIS Search Results

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In binary representation: sum of number of 1's of prime factors of n (with repetition).

+0
1

0, 1, 2, 2, 2, 3, 3, 3, 4, 3, 3, 4, 3, 4, 4, 4, 2, 5, 3, 4, 5, 4, 4, 5, 4, 4, 6, 5, 4, 5, 5, 5, 5, 3, 5, 6, 3, 4, 5, 5, 3, 6, 4, 5, 6, 5, 5, 6, 6, 5, 4, 5, 4, 7, 5, 6, 5, 5, 5, 6, 5, 6, 7, 6, 5, 6, 3, 4, 6, 6, 4, 7, 3, 4, 6, 5, 6, 6, 5, 6, 8, 4, 4, 7, 4, 5, 6, 6, 4, 7, 6, 6, 7, 6, 5, 7, 3, 7, 7, 6, 4, 5, 5, 6, 7 (list; graph; listen)

	OFFSET	`1,3`
	EXAMPLE	`a(20) = a(225) = a('10' * '10' * '101') = 1+1+2 = 4.`
	CROSSREFS	`Cf. A000120, A007088.` `Sequence in context: A104055 A022870 A131410 this_sequence A134598 A064515 A112754` `Adjacent sequences: A080770 A080771 A080772 this_sequence A080774 A080775 A080776`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)lhsystems.com), Mar 10 2003`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

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