A139402 Prime numbers k such that 8*k+1 and 8*k+3 are also primes.

2, 5, 17, 71, 101, 107, 131, 491, 677, 761, 821, 1307, 1361, 1367, 1667, 2081, 2207, 2837, 3461, 3467, 3761, 3767, 4007, 5087, 5147, 5231, 5381, 5927, 6701, 6737, 6917, 6977, 8447, 8741, 8807, 9011, 9341, 9677, 9767

Offset

1,1

Links

Amiram Eldar, Table of n, a(n) for n = 1..10000

Mathematica

a = {}; Do[If[PrimeQ[8 n + 1] && PrimeQ[8 n + 3] && PrimeQ[n], AppendTo[a, n]], {n, 1, 10000}]; a

Crossrefs

Cf. A125822.

Sequence in context: A049774 A317132 A335926 * A143382 A057219 A084869

Adjacent sequences: A139399 A139400 A139401 * A139403 A139404 A139405

Keyword

nonn

Author

Artur Jasinski, Apr 19 2008

Status

approved