id:A047828 - OEIS Search Results

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Becomes prime after exactly 9 iterations of f(x) = sum of prime factors of x.

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41037, 55694, 82083, 86662, 88982, 90177, 106221, 106562, 109838, 111388, 123111, 134098, 168049, 173324, 177697, 177964, 179995, 195458, 207574, 213124, 214779, 215994, 219676, 222776, 229315, 233857, 240070, 240115, 244534, 246249 (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: A097479 A133863 A033532 this_sequence A141711 A074379 A027577` `Adjacent sequences: A047825 A047826 A047827 this_sequence A047829 A047830 A047831`
	KEYWORD	`nonn`
	AUTHOR	`David W. Wilson (davidwwilson(AT)comcast.net)`

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Last modified December 21 10:15 EST 2009. Contains 171081 sequences.

AT&T Labs Research