id:A047827 - OEIS Search Results

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

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13682, 18002, 19137, 22934, 24014, 24787, 27364, 27849, 30062, 30993, 32577, 33477, 35410, 35798, 36004, 36398, 36706, 39206, 43333, 43917, 44493, 45219, 45734, 45868, 46142, 46405, 48028, 49546, 50642, 51295, 52413, 53283, 54728 (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: A157727 A108418 A088870 this_sequence A157669 A031807 A119730` `Adjacent sequences: A047824 A047825 A047826 this_sequence A047828 A047829 A047830`
	KEYWORD	`nonn`
	AUTHOR	`David W. Wilson (davidwwilson(AT)comcast.net)`

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Last modified December 16 17:13 EST 2009. Contains 170825 sequences.

AT&T Labs Research