id:A048125 - OEIS Search Results

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Becomes prime or 4 after exactly 3 iterations of f(x) = sum of prime factors of x.

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14, 15, 16, 18, 20, 24, 27, 38, 46, 68, 87, 124, 141, 152, 155, 158, 161, 166, 171, 183, 185, 186, 195, 203, 208, 209, 212, 218, 221, 222, 226, 230, 231, 232, 234, 247, 249, 255, 261, 272, 275, 276, 290, 295, 299, 301, 306, 314, 322, 323, 330, 335, 341, 343 (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: A004455 A142865 A089838 this_sequence A163482 A130687 A136012` `Adjacent sequences: A048122 A048123 A048124 this_sequence A048126 A048127 A048128`
	KEYWORD	`nonn`
	AUTHOR	`David W. Wilson (davidwwilson(AT)comcast.net)`

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Last modified December 2 11:54 EST 2009. Contains 167921 sequences.

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