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A023327 Numbers n such that n remains prime through 4 iterations of function f(x) = 9x + 10. 0
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; text; internal format)
OFFSET

1,1

COMMENTS

n, 9*n+10, 81*n+100, 729*n+910 and 6561*n+8200 are primes. [From Vincenzo Librandi, Aug 04 2010]

LINKS

Table of n, a(n) for n=1..37.

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, Aug 04 2010]

CROSSREFS

Sequence in context: A033204 A046297 A141992 * A023324 A034846 A023352

Adjacent sequences:  A023324 A023325 A023326 * A023328 A023329 A023330

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified October 23 03:24 EDT 2014. Contains 248411 sequences.