id:A048133 - OEIS Search Results

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Least number which becomes prime or 4 after exactly n iterations of f(x) = sum of prime factors of x.

+0
3

2, 6, 8, 14, 26, 62, 134, 393, 1257, 4659, 9314, 27933, 167073, 334142, 4677862, 14033577, 56134292 (list; graph; listen)

	OFFSET	`0,1`
	COMMENT	`f(x) = sum of prime factors with multiplicity, so that f(1500) = 2+2+3+5+5+5 = 22.`
	CROSSREFS	`Sequence in context: A117588 A022112 A107019 this_sequence A135619 A029933 A128913` `Adjacent sequences: A048130 A048131 A048132 this_sequence A048134 A048135 A048136`
	KEYWORD	`nonn`
	AUTHOR	`David W. Wilson (davidwwilson(AT)comcast.net)`

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Last modified September 6 16:04 EDT 2008. Contains 143483 sequences.