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A050778
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Primes that are ending primes after the iterated procedure of 'composite added to the sum of its prime factors reaches a prime'.
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1
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11, 17, 19, 23, 29, 31, 41, 47, 53, 59, 71, 79, 83, 89, 103, 107, 109, 113, 127, 131, 149, 151, 167, 179, 191, 227, 229, 239, 241, 251, 263, 269, 271, 293, 311, 313, 317, 331, 337, 359, 373, 383, 401, 419, 431, 439, 443, 449, 461, 467, 479, 491, 503, 509, 521
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OFFSET
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1,1
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LINKS
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Table of n, a(n) for n=1..55.
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EXAMPLE
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E.g. 383 is ending prime for the following composites 182, 204, 218, 226, 228, 254, 329 and 341. For instance 341 (=11*31) -> 341 + (11+31) = 341 + 42 = 383.
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CROSSREFS
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Cf. A050779, A050703-A050710.
Sequence in context: A050713 A217063 A038966 * A049593 A216664 A019412
Adjacent sequences: A050775 A050776 A050777 * A050779 A050780 A050781
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KEYWORD
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nonn
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AUTHOR
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Patrick De Geest, Sep 15 1999.
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STATUS
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approved
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