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A023327
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Numbers n such that n remains prime through 4 iterations of function f(x) = 9x + 10.
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103, 281, 293, 823, 937, 1733, 3361, 3919, 4129, 6101, 8443, 15413, 16217, 17959, 21067, 26459, 26479, 30253, 31247, 36691, 37171, 38561, 40493, 41411, 46451, 57709, 60869, 64621, 79433, 79987, 89821, 92821, 113567, 114997, 118873, 125539, 142573
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| n, 9*n+10, 81*n+100, 729*n+910 and 6561*n+8200 are primes. [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Aug 04 2010]
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PROG
| (MAGMA) [n: n in [1..5000000] | IsPrime(n) and IsPrime(9*n+10) and IsPrime(81*n+100) and IsPrime(729*n+910) and IsPrime(6561*n+8200)] [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Aug 04 2010]
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CROSSREFS
| Sequence in context: A033204 A046297 A141992 * A023324 A034846 A023352
Adjacent sequences: A023324 A023325 A023326 * A023328 A023329 A023330
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KEYWORD
| nonn
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AUTHOR
| David W. Wilson (davidwwilson(AT)comcast.net)
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