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A023315 Numbers n such that n remains prime through 4 iterations of function f(x) = 5x + 6. 2
79, 401, 1259, 2477, 3019, 4409, 10303, 15679, 20509, 24499, 34127, 43987, 44389, 53101, 66359, 71287, 74857, 81097, 85903, 90803, 93053, 102811, 103231, 104999, 112601, 125453, 132533, 144731, 156347, 157793, 160817, 161839, 163981, 170641 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

n, 5*n+6, 25*n+36, 125*n+186 and 625*n+936 are primes. - Vincenzo Librandi, Aug 04 2010

LINKS

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

FORMULA

a(n) == 9 or 13 (mod 14). - John Cerkan, Oct 07 2016

PROG

(MAGMA) [n: n in [1..1000000] | IsPrime(n) and IsPrime(5*n+6) and IsPrime(25*n+36) and IsPrime(125*n+186) and IsPrime(625*n+936)] // Vincenzo Librandi, Aug 04 2010

CROSSREFS

Subsequence of A023219, A023254, A023285, and A081759.

Sequence in context: A132252 A069795 A142556 * A142618 A248819 A141563

Adjacent sequences:  A023312 A023313 A023314 * A023316 A023317 A023318

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified August 4 13:09 EDT 2020. Contains 336201 sequences. (Running on oeis4.)