A123978 Numbers k for which 8*k+1, 8*k+3 and 8*k+7 are primes.

2, 5, 80, 107, 110, 185, 260, 332, 500, 1067, 1307, 1472, 1625, 1760, 1790, 1955, 2255, 2612, 2627, 2672, 2882, 2945, 3197, 3335, 3467, 3965, 4007, 4037, 4040, 4202, 4355, 4880, 5147, 5252, 5525, 6242, 6812, 6917, 6977, 7430, 7787, 8192, 8612, 8657, 8720

Offset

1,1

Links

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

Mathematica

Select[Range[10^4], And @@ PrimeQ /@ ({1, 3, 7} + 8#) &] (* Ray Chandler, Nov 05 2006 *)

Crossrefs

Cf. A005122, A005123, A005124.

Sequence in context: A082080 A127997 A096266 * A303482 A360503 A290952

Adjacent sequences: A123975 A123976 A123977 * A123979 A123980 A123981

Keyword

nonn

Author

Artur Jasinski, Oct 30 2006

Extensions

Extended by Ray Chandler, Nov 05 2006

Status

approved