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A050773
Iterated procedure 'composite k added to sum of its prime factors reaches a prime' yields 6 skipped primes.
0
4, 22, 54, 93, 111, 145, 155, 185, 221, 231, 377, 450, 667, 688, 992, 1122, 1161, 1428, 1638, 1995, 2144, 2220, 2624, 2820, 2838, 3627, 3774, 3876, 4225, 4761, 5106, 5434, 5590, 5676, 5850, 6188, 6216, 6405, 6734, 8364, 8554, 9196, 9471, 9558, 10660
OFFSET
1,1
EXAMPLE
a(2)=22 + (2+11) = 35 + (5+7) = ending prime 47. Between 22 and 47 one finds 6 primes 23, 29, 31, 37, 41 and 43.
CROSSREFS
Sequence in context: A163433 A187930 A022603 * A122241 A341375 A076525
KEYWORD
nonn
AUTHOR
Patrick De Geest, Sep 15 1999
EXTENSIONS
Offset corrected by Sean A. Irvine, Aug 18 2021
STATUS
approved