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A139406 Numbers k such that 8k+1 and 8k+5 are primes. 1
12, 24, 39, 57, 84, 96, 117, 126, 162, 186, 201, 234, 249, 267, 297, 309, 327, 336, 354, 357, 369, 402, 432, 441, 459, 462, 474, 516, 519, 564, 591, 621, 654, 696, 711, 717, 732, 777, 822, 942, 969, 984, 1011, 1029, 1086, 1092, 1116, 1167, 1179, 1272, 1341 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..51.

MATHEMATICA

a = {}; Do[If[PrimeQ[8 n + 1] && PrimeQ[8 n + 5], AppendTo[a, n]], {n, 1, 1000}]; a

Select[Range[1500], And@@PrimeQ[8 #+{1, 5}]&] (* Harvey P. Dale, Aug 14 2011 *)

CROSSREFS

Cf. A001109, A125821, A125822, A139402, A139404, A139405, A139407.

Sequence in context: A091193 A174018 A098242 * A140831 A126855 A102749

Adjacent sequences:  A139403 A139404 A139405 * A139407 A139408 A139409

KEYWORD

nonn

AUTHOR

Artur Jasinski, Apr 19 2008

STATUS

approved

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Last modified May 27 02:54 EDT 2019. Contains 323597 sequences. (Running on oeis4.)