A050773 Iterated procedure 'composite k added to sum of its prime factors reaches a prime' yields 6 skipped primes.

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

Links

Table of n, a(n) for n=1..45.

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

Cf. A050703, A050710.

Sequence in context: A163433 A187930 A022603 * A122241 A341375 A076525

Adjacent sequences: A050770 A050771 A050772 * A050774 A050775 A050776

Keyword

nonn

Author

Patrick De Geest, Sep 15 1999

Extensions

Offset corrected by Sean A. Irvine, Aug 18 2021

Status

approved