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A050773 Iterated procedure 'composite k added to sum of its prime factors reaches a prime' yields 6 skipped primes. 0

%I #9 Aug 18 2021 23:45:51

%S 4,22,54,93,111,145,155,185,221,231,377,450,667,688,992,1122,1161,

%T 1428,1638,1995,2144,2220,2624,2820,2838,3627,3774,3876,4225,4761,

%U 5106,5434,5590,5676,5850,6188,6216,6405,6734,8364,8554,9196,9471,9558,10660

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

%e 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.

%Y Cf. A050703, A050710.

%K nonn

%O 1,1

%A _Patrick De Geest_, Sep 15 1999

%E Offset corrected by _Sean A. Irvine_, Aug 18 2021

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Last modified August 3 04:18 EDT 2024. Contains 374875 sequences. (Running on oeis4.)