id:A048129 - OEIS Search Results

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Becomes prime or 4 after exactly 7 iterations of f(x) = sum of prime factors of x.

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393, 422, 614, 674, 692, 886, 889, 934, 993, 1006, 1270, 1285, 1502, 1522, 1524, 1542, 1726, 1822, 2018, 2217, 2326, 2386, 2402, 2474, 2545, 2654, 2733, 2734, 2761, 2858, 2876, 3005, 3022, 3039, 3054, 3147, 3193, 3261, 3453, 3507, 3512, 3518, 3589 (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: A068288 A085019 A105233 this_sequence A045194 A105210 A158002` `Adjacent sequences: A048126 A048127 A048128 this_sequence A048130 A048131 A048132`
	KEYWORD	`nonn`
	AUTHOR	`David W. Wilson (davidwwilson(AT)comcast.net)`

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Last modified December 17 19:39 EST 2009. Contains 170821 sequences.

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