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A139403 Prime numbers k such that 8k+3 and 8k+5 are also primes. 0
7, 13, 43, 103, 127, 181, 223, 241, 283, 421, 433, 733, 787, 853, 1291, 1303, 1531, 1567, 1741, 2017, 2161, 2281, 2593, 2857, 2953, 3163, 3361, 3571, 3673, 4003, 4051, 4441, 4513, 4597, 4663, 4831, 4903, 5503, 5647, 5923, 6067, 6091, 6217, 6361, 6427 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..45.

MATHEMATICA

a = {}; Do[If[PrimeQ[8 n + 5] && PrimeQ[8 n + 3] && PrimeQ[n], AppendTo[a, n]], {n, 1, 10000}]; a

CROSSREFS

Cf. A125822, A139402, A139404.

Sequence in context: A151781 A224502 A047977 * A087820 A272032 A023286

Adjacent sequences:  A139400 A139401 A139402 * A139404 A139405 A139406

KEYWORD

nonn

AUTHOR

Artur Jasinski, Apr 19 2008

STATUS

approved

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Last modified December 15 03:48 EST 2019. Contains 329990 sequences. (Running on oeis4.)