id:A046053 - OEIS Search Results

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Total number of prime factors of the repunit R(n)=(10^n-1)/9.

+0
19

0, 0, 1, 2, 2, 2, 5, 2, 4, 4, 4, 2, 7, 3, 4, 6, 6, 2, 9, 1, 7, 7, 7, 1, 10, 5, 6, 7, 8, 5, 13, 3, 11, 6, 6, 7, 12, 3, 3, 6, 11, 4, 15, 4, 11, 10, 6, 2, 13, 4, 10, 8, 9, 4, 14, 8, 12, 6, 8, 2, 20, 7, 5, 14, 15, 7, 15, 3, 10, 6, 12, 2, 18, 3, 7, 12, 6, 8, 16, 6, 15, 13, 7, 3, 22, 7, 8, 10, 15, 5 (list; graph; listen)

	OFFSET	`0,4`
	LINKS	`Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics.`
	EXAMPLE	`R(6) = 111111 = (3) (7) (11) (13) (37), so a(6) = 5.`
	CROSSREFS	`Cf. A002275. For the number of distinct prime factors see A095370.` `Adjacent sequences: A046050 A046051 A046052 this_sequence A046054 A046055 A046056` `Sequence in context: A113516 A120642 A095370 this_sequence A080348 A096396 A029662`
	KEYWORD	`nonn`
	AUTHOR	`Eric Weisstein (eric(AT)weisstein.com)`

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Last modified November 8 07:45 EST 2009. Contains 166143 sequences.

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