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Search: id:A050776
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| A050776 |
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Iterated procedure 'composite k added to sum of its prime factors reaches a prime' yields 9 skipped primes. |
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2
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| 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
(list; graph; listen)
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OFFSET
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0,1
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EXAMPLE
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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.
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CROSSREFS
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Cf. A050703, A050710.
Adjacent sequences: A050773 A050774 A050775 this_sequence A050777 A050778 A050779
Sequence in context: A087248 A046401 A091455 this_sequence A090692 A102843 A062385
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KEYWORD
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nonn
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AUTHOR
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Patrick De Geest (pdg(AT)worldofnumbers.com), Sep 15 1999.
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