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A050771 Iterated procedure 'composite k added to sum of its prime factors reaches a prime' yields 4 skipped primes. 0

%I #5 Oct 17 2019 22:44:00

%S 8,9,34,38,51,65,68,85,96,116,143,224,225,304,306,416,448,544,546,570,

%T 600,621,640,714,783,810,1020,1134,1197,1254,1280,1408,1521,1540,1666,

%U 1716,1806,1900,1953,2088,2646,2760,3159,3185,3255,3392,3920,3968,4176

%N Iterated procedure 'composite k added to sum of its prime factors reaches a prime' yields 4 skipped primes.

%e a(2)=9 + (3+3) = 15 + (3+5) = ending prime 23. Between 9 and 23 one finds 4 primes 11, 13, 17 and 19.

%Y Cf. A050703, A050710.

%K nonn

%O 0,1

%A _Patrick De Geest_, Sep 15 1999

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