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A186104
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Primes of the form 3*6^n - 1.
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4
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2, 17, 107, 647, 23327, 139967, 30233087, 6530347007, 39182082047, 14215144014964850687, 240614901699187213221099227578367, 53193679461858262403856737876228196870083927814929645567
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OFFSET
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1,1
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COMMENTS
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For the exponents n see A186106.
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LINKS
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Charles R Greathouse IV, Table of n, a(n) for n = 1..21
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PROG
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(MAGMA) [3*6^n-1: n in [0..140] | IsPrime(3*6^n-1)]; // Bruno Berselli, Feb 12 2011
(PARI) v=[]; for(n=0, 1e3, if(ispseudoprime(k=3*6^n-1), v=concat(v, k))); v \\ Charles R Greathouse IV, Jul 26 2011
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CROSSREFS
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Sequence in context: A105652 A204238 A198796 * A155845 A115354 A100274
Adjacent sequences: A186101 A186102 A186103 * A186105 A186106 A186107
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KEYWORD
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nonn
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AUTHOR
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Gilbert Mozzo, Feb 12 2011
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EXTENSIONS
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Edited by N. J. A. Sloane, Feb 12 2011
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STATUS
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approved
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