id:A047822 - OEIS Search Results

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Becomes prime after exactly 3 iterations of f(x) = sum of prime factors of x.

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26, 33, 38, 52, 70, 74, 76, 86, 99, 104, 105, 106, 115, 122, 129, 138, 140, 146, 148, 152, 159, 161, 166, 172, 178, 185, 187, 195, 205, 208, 209, 212, 218, 221, 222, 230, 231, 244, 246, 266, 267, 276, 278, 280, 292, 296, 297, 302, 304, 305, 315, 321, 327 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`f(x) = sum of prime factors without multiplicity, so that f(1500) = 2+3+5 = 10.`
	CROSSREFS	`Adjacent sequences: A047819 A047820 A047821 this_sequence A047823 A047824 A047825` `Sequence in context: A134252 A050770 A050438 this_sequence A048126 A080932 A129914`
	KEYWORD	`nonn`
	AUTHOR	`David W. Wilson (davidwwilson(AT)comcast.net)`

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Last modified October 11 09:12 EDT 2008. Contains 144832 sequences.

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