A139405 Numbers k such that 8*k+1 and 8*k+7 are primes.

2, 5, 9, 12, 24, 29, 32, 44, 54, 57, 74, 75, 80, 107, 110, 122, 129, 137, 152, 162, 165, 170, 179, 185, 194, 200, 207, 219, 222, 234, 249, 260, 267, 285, 297, 299, 302, 305, 332, 339, 362, 414, 432, 452, 470, 500, 509, 519, 555, 557, 564, 570, 582, 584, 599

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 + 7], AppendTo[a, n]], {n, 1, 1000}]; a

Crossrefs

Cf. A017077, A004771.

Cf. A125821, A125822, A139402, A139404.

Sequence in context: A112988 A218706 A270950 * A360899 A104862 A190686

Adjacent sequences: A139402 A139403 A139404 * A139406 A139407 A139408

Keyword

nonn

Author

Artur Jasinski, Apr 19 2008

Status

approved