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A023312 Numbers n such that n remains prime through 4 iterations of function f(x) = 4x + 9. 2
883, 2857, 4073, 4663, 9311, 11131, 16493, 18257, 19541, 22063, 28687, 35837, 48383, 55817, 59393, 62131, 71387, 73037, 73133, 78173, 83423, 86111, 88261, 90511, 93287, 93811, 99377, 101051, 104537, 122203, 125927, 149497, 152377, 153941, 155653 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

n, 4*n+9, 16*n+45, 64*n+189 and 256*n+765 are primes. - Vincenzo Librandi, Aug 04 2010

LINKS

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

PROG

(MAGMA) [n: n in [1..1000000] | IsPrime(n) and IsPrime(4*n+9) and IsPrime(16*n+45) and IsPrime(64*n+189) and IsPrime(256*n+765)] // Vincenzo Librandi, Aug 04 2010

CROSSREFS

Subsequence of A023216, A023251, A023282, and A111199.

Sequence in context: A260926 A129470 A129471 * A129469 A206794 A206964

Adjacent sequences:  A023309 A023310 A023311 * A023313 A023314 A023315

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified September 18 16:05 EDT 2020. Contains 337169 sequences. (Running on oeis4.)