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A050710 Smallest composite that when added to sum of prime factors reaches a prime after n iterations. 26
6, 8, 4, 32, 49, 45, 60, 125, 82, 66, 150, 129, 559, 417, 358, 378, 314, 279, 247, 183, 1152, 1102, 2265, 1929, 1658, 1524, 1414, 5708, 8047, 6033, 8430, 8020, 7852, 11805, 11715, 9388, 12622, 13471, 13146, 12562, 12512, 20830, 16869, 13492, 58832 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

EXAMPLE

E.g. n=2 gives a(2)=8 -> 8 = 2.2.2 so 8 + (2+2+2) = 14 and composite (iteration 1); 14 = 2.7 so 14 + (2+7) = 23 and already prime after the second iteration.

CROSSREFS

Cf. A050703-A050709. See also A050767.

Sequence in context: A065166 A006255 A110760 * A123092 A199171 A010501

Adjacent sequences:  A050707 A050708 A050709 * A050711 A050712 A050713

KEYWORD

nonn

AUTHOR

Patrick De Geest (pdg(AT)worldofnumbers.com), Aug 15 1999.

EXTENSIONS

More terms from Michel ten Voorde (seqfan(AT)tenvoorde.org)

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Last modified February 15 15:20 EST 2012. Contains 205823 sequences.