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A023295 Numbers n such that n remains prime through 3 iterations of function f(x) = 8x + 9. 2
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; text; internal format)
OFFSET

1,1

COMMENTS

n, 8*n+9, 64*n+81 and 512*n+657 are primes. - Vincenzo Librandi, Aug 04 2010

LINKS

John Cerkan, Table of n, a(n) for n = 1..10000

a(n) == 3 (mod 10). - John Cerkan, Sep 24 2016

PROG

(MAGMA) [n: n in [1..450000] | IsPrime(n) and IsPrime(8*n+9) and IsPrime(64*n+81) and IsPrime(512*n+657)] // Vincenzo Librandi, Aug 04 2010

CROSSREFS

Subsequence of A023232, A023264, and of A153762.

Sequence in context: A202667 A129991 A265681 * A169596 A142553 A123782

Adjacent sequences:  A023292 A023293 A023294 * A023296 A023297 A023298

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified September 20 02:20 EDT 2019. Contains 327207 sequences. (Running on oeis4.)