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A023337
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Numbers n such that n remains prime through 5 iterations of function f(x) = 3x + 8.
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3181, 61981, 134291, 342821, 459091, 882451, 984931, 1016011, 1028471, 1181701, 1391561, 1897801, 2009311, 2272301, 2476421, 2769791, 3048041, 3085421, 3128821, 3207221, 3545111, 4092931, 4690591, 5015321, 5863651, 6027941, 6361351, 6796541
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| n, 3*n+8, 9*n+32, 27*n+104, 81*n+320, 243*n+968 are primes. [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Aug 05 2010]
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PROG
| (MAGMA) [n: n in [1..25000000] | IsPrime(n) and IsPrime(3*n+8) and IsPrime(9*n+32) and IsPrime(27*n+104) and IsPrime(81*n+320) and IsPrime(243*n+968)] [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Aug 05 2010]
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CROSSREFS
| Sequence in context: A155484 A129472 A023309 * A205034 A205282 A115932
Adjacent sequences: A023334 A023335 A023336 * A023338 A023339 A023340
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KEYWORD
| nonn
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AUTHOR
| David W. Wilson (davidwwilson(AT)comcast.net)
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