A050775 - OEIS

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A050775

Iterated procedure 'composite k added to sum of its prime factors reaches a prime' yields 8 skipped primes.

16, 36, 74, 80, 81, 86, 115, 119, 121, 123, 141, 215, 266, 276, 360, 451, 465, 572, 779, 868, 1548, 1624, 1674, 1763, 1917, 1925, 2196, 2331, 2368, 2730, 3108, 3306, 3430, 3816, 4452, 4575, 5110, 5312, 5412, 6273, 6324, 6820, 7632, 8772, 9027, 9204, 9435

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..47.

EXAMPLE

a(6)=86 + (2+43) = ending prime 131. Between 86 and 131 one finds 8 primes 89, 97, 101, 103, 107, 109, 113 and 127.

CROSSREFS

Cf. A050703, A050710.

Sequence in context: A031360 A295016 A125240 * A022040 A074985 A229134

Adjacent sequences: A050772 A050773 A050774 * A050776 A050777 A050778

KEYWORD

nonn

AUTHOR

Patrick De Geest, Sep 15 1999

EXTENSIONS

Offset corrected by Sean A. Irvine, Aug 18 2021

STATUS

approved