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A023295
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Numbers n such that n remains prime through 3 iterations of function f(x) = 8x + 9.
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0
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23, 643, 2293, 5023, 5653, 9643, 10723, 11503, 12823, 15493, 18353, 18773, 28403, 32003, 32183, 41953, 42853, 45233, 49853, 50873, 52103, 53113, 54623, 56123, 76003, 80803, 84443, 86783, 88813, 89413, 92033, 95213, 96823, 97943, 100613, 115793
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| n, 8*n+9, 64*n+81 and 512*n+657 are primes. [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Aug 04 2010]
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PROG
| (MAGMA) [n: n in [1..450000] | IsPrime(n) and IsPrime(8*n+9) and IsPrime(64*n+81) and IsPrime(512*n+657)] [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Aug 04 2010]
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CROSSREFS
| Sequence in context: A142750 A202667 A129991 * A169596 A142553 A123782
Adjacent sequences: A023292 A023293 A023294 * A023296 A023297 A023298
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KEYWORD
| nonn
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AUTHOR
| David W. Wilson (davidwwilson(AT)comcast.net)
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