id:A048130 - OEIS Search Results

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Becomes prime or 4 after exactly 8 iterations of f(x) = sum of prime factors of x.

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1257, 1556, 1774, 1982, 2566, 2649, 4249, 4405, 4497, 4645, 5086, 5169, 5286, 5317, 5462, 5574, 6070, 6074, 6382, 6518, 7064, 7149, 7197, 7284, 7694, 7813, 7947, 8043, 8193, 8593, 8605, 8852, 8894, 8902, 8998, 9057, 9182, 9562, 9575, 10232, 10326 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`f(x) = sum of prime factors with multiplicity, so that f(1500) = 2+2+3+5+5+5 = 22.`
	CROSSREFS	`Sequence in context: A067203 A080718 A159726 this_sequence A099592 A014575 A144563` `Adjacent sequences: A048127 A048128 A048129 this_sequence A048131 A048132 A048133`
	KEYWORD	`nonn`
	AUTHOR	`David W. Wilson (davidwwilson(AT)comcast.net)`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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