A244087 Numbers n such that 4*n+3 and 8*n+7 are prime.

0, 2, 5, 20, 32, 44, 47, 59, 62, 89, 104, 107, 110, 122, 164, 170, 179, 185, 227, 254, 257, 275, 305, 359, 362, 374, 377, 389, 395, 452, 482, 500, 509, 515, 584, 587, 599, 614, 635, 674, 704, 725, 734, 740, 755, 824, 839, 872, 884, 905, 944, 950, 962, 965, 977

Offset

1,2

Comments

-2 is a primitive root mod (8*n+7).

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

Mathematica

Select[Range[0, 1500], PrimeQ[4 # + 3]&&PrimeQ[8 # + 7] &]

Prog

(Magma) [n: n in [0..1000] | IsPrime(4*n+3) and IsPrime(8*n+7)];

Crossrefs

Intersection of A095278 and A139487.

Sequence in context: A077138 A247131 A192164 * A361134 A056726 A176042

Adjacent sequences: A244084 A244085 A244086 * A244088 A244089 A244090

Keyword

nonn,easy

Author

Vincenzo Librandi, Jun 25 2014

Status

approved