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A139405
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Numbers k such that 8k+1 and 8k+7 are primes.
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2
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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
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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MATHEMATICA
| a = {}; Do[If[PrimeQ[8 n + 1] && PrimeQ[8 n + 7], AppendTo[a, n]], {n, 1, 1000}]; a
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CROSSREFS
| Cf. A001109, A125821, A125822, A139402, A139404.
Sequence in context: A034307 A070828 A112988 * A104862 A190686 A114471
Adjacent sequences: A139402 A139403 A139404 * A139406 A139407 A139408
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KEYWORD
| nonn
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AUTHOR
| Artur Jasinski (grafix(AT)csl.pl), Apr 19 2008
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