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Search: id:A138048
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| A138048 |
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Numbers n such that 15^n + 2 is prime. |
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+0
6
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| 0, 1, 2, 4, 5, 10, 11, 16, 20, 52, 75, 106, 112, 132, 371
(list; graph; listen)
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OFFSET
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1,3
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COMMENT
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One further term, 10365, was found by Lelio R Paula in 2006 - see the PRP Records link.
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LINKS
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Henri & Renaud Lifchitz, PRP Records.
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MATHEMATICA
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Do[ f = 15^n + 2; If[ PrimeQ[ f ], Print[ {n, f} ] ], {n, 1, 371} ]
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CROSSREFS
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Cf. A051783 = Numbers n such that 3^n + 2 is prime. Cf. A087885 = Numbers n such that 5^n + 2 is prime. Cf. A090649, A109076, A113480, A138049, A138050, A138051, A087886, A138052, A138053, A138054, A138055, A138056, A138057, A138058, A138059, A138060, A113481.
Sequence in context: A003278 A004792 A167795 this_sequence A057762 A109511 A018339
Adjacent sequences: A138045 A138046 A138047 this_sequence A138049 A138050 A138051
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KEYWORD
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hard,more,nonn
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AUTHOR
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Alexander Adamchuk (alex(AT)kolmogorov.com), Mar 02 2008
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