A023336 Primes that remain prime through 5 iterations of function f(x) = 3x + 4.

34613, 165443, 321053, 363403, 474143, 496333, 528673, 631853, 834503, 957563, 1199623, 1274803, 1817093, 1918733, 2063423, 2611663, 2889703, 3224233, 3652703, 3697433, 3824413, 3852973, 4655873, 4708793, 5089943, 5508263, 5937853, 6067073

Offset

1,1

Comments

Primes p such that 3*p+4, 9*p+16, 27*p+52, 81*p+160 and 243*p+484 are also primes. - Vincenzo Librandi, Aug 05 2010

Links

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

Formula

a(n) == 33 (mod 70). - John Cerkan, Oct 10 2016

Prog

(Magma) [n: n in [1..25000000] | IsPrime(n) and IsPrime(3*n+4) and IsPrime(9*n+16) and IsPrime(27*n+52) and IsPrime(81*n+160) and IsPrime(243*n+484)] // Vincenzo Librandi, Aug 05 2010

Crossrefs

Subsequence of A023209, A023247, A023278, A023308, and A034936.

Sequence in context: A225025 A081428 A237955 * A172579 A172570 A172672

Adjacent sequences: A023333 A023334 A023335 * A023337 A023338 A023339

Keyword

nonn

Author

David W. Wilson

Status

approved