A050776 Iterated procedure 'composite k added to sum of its prime factors reaches a prime' yields 9 skipped primes.

30, 42, 99, 174, 188, 212, 216, 295, 329, 348, 371, 620, 627, 629, 649, 851, 901, 925, 957, 1081, 1189, 1248, 1353, 1363, 1696, 1830, 1880, 2133, 2173, 2491, 2664, 3660, 3843, 4020, 4420, 5056, 5688, 6327, 6700, 7540, 7626, 7808, 7888, 7900, 8295, 8778

Offset

1,1

Links

Table of n, a(n) for n=1..46.

Example

a(3)=99 + (3+3+11) = 116 + (2+2+29) = ending prime 149. Between 99 and 149 one finds 9 primes 101, 103, 107, 109, 113, 127, 131, 137 and 139.

Crossrefs

Cf. A050703, A050710.

Sequence in context: A219742 A348557 A257832 * A268697 A258358 A090692

Adjacent sequences: A050773 A050774 A050775 * A050777 A050778 A050779

Keyword

nonn

Author

Patrick De Geest, Sep 15 1999

Extensions

Offset corrected by Sean A. Irvine, Aug 18 2021

Status

approved