id:A047826 - OEIS Search Results

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Becomes prime after exactly 7 iterations of f(x) = sum of prime factors of x.

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1774, 2566, 3548, 4497, 5132, 6382, 6843, 7096, 7538, 8043, 8882, 8902, 9003, 9286, 10264, 10334, 10862, 10997, 11019, 11162, 11469, 11490, 12009, 12226, 12442, 12507, 12764, 12817, 12842, 13215, 13491, 13849, 13947, 14192, 14642, 14677 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`f(x) = sum of prime factors without multiplicity, so that f(1500) = 2+3+5 = 10.`
	CROSSREFS	`Sequence in context: A031630 A031540 A135795 this_sequence A023088 A114075 A013593` `Adjacent sequences: A047823 A047824 A047825 this_sequence A047827 A047828 A047829`
	KEYWORD	`nonn`
	AUTHOR	`David W. Wilson (davidwwilson(AT)comcast.net)`

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

AT&T Labs Research