id:A050768 - OEIS Search Results

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Iterated procedure 'composite k added to sum of its prime factors reaches a prime' yields 1 skipped prime.

+0
2

6, 20, 48, 112, 320, 1326, 1400, 4165, 4374, 10395, 12852, 15827, 20412, 23232, 24300, 24990, 25000, 27200, 27300, 31407, 33660, 34965, 38480, 41553, 42525, 50688, 53508, 65450, 66000, 68400, 69498 (list; graph; listen)

	OFFSET	`0,1`
	EXAMPLE	`a(2)=20 + (2+2+5) = ending prime 29. Between 20 and 29 lies exactly one prime 23.`
	CROSSREFS	`Cf. A050703, A050710.` `Sequence in context: A005564 A011928 A055455 this_sequence A063488 A002415 A052515` `Adjacent sequences: A050765 A050766 A050767 this_sequence A050769 A050770 A050771`
	KEYWORD	`nonn`
	AUTHOR	`Patrick De Geest (pdg(AT)worldofnumbers.com), Sep 15 1999.`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

AT&T Labs Research