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A023288 Primes that remain prime through 3 iterations of function f(x) = 6x + 5. 3
2, 11, 13, 31, 71, 83, 151, 163, 193, 197, 317, 347, 373, 503, 577, 811, 911, 919, 1049, 1051, 1201, 1423, 1721, 1907, 2089, 2243, 2543, 2719, 2963, 3529, 3583, 3607, 3797, 4091, 4153, 4217, 4243, 4409, 4591, 4637, 4783, 5209, 5557, 5783, 5849, 5923, 6091 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Primes p such that 6*p+5, 36*p+35 and 216*p+215 are also primes. - Vincenzo Librandi, Aug 04 2010

LINKS

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

PROG

(MAGMA) [n: n in [1..150000] | IsPrime(n) and IsPrime(6*n+5) and IsPrime(36*n+35) and IsPrime(216*n+215)] // Vincenzo Librandi, Aug 04 2010

CROSSREFS

Subsequence of A023221, A023257, and A059325.

Sequence in context: A105887 A019407 A075781 * A106960 A084405 A041447

Adjacent sequences:  A023285 A023286 A023287 * A023289 A023290 A023291

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified October 26 02:14 EDT 2021. Contains 348256 sequences. (Running on oeis4.)