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A244087
Numbers n such that 4*n+3 and 8*n+7 are prime.
1
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
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
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Jun 25 2014
STATUS
approved