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A124849
Numbers k such that 7k + 3 and 3k + 7 are primes.
2
0, 2, 4, 8, 10, 22, 32, 34, 40, 44, 50, 52, 58, 68, 74, 88, 92, 110, 122, 134, 142, 160, 164, 178, 188, 208, 212, 242, 250, 260, 268, 272, 304, 320, 334, 344, 352, 370, 374, 382, 388, 398, 424, 428, 440, 458, 464, 472, 484, 494, 508, 520, 524, 538, 550, 554, 572
OFFSET
1,2
COMMENTS
Intersection of A089033 and A089953.
LINKS
MATHEMATICA
Select[Range[0, 600], AllTrue[{7#+3, 3#+7}, PrimeQ]&] (* The program uses the AllTrue function from Mathematica version 10 *) (* Harvey P. Dale, May 27 2018 *)
PROG
(Magma) [n: n in [0..1000] | IsPrime(7*n+3) and IsPrime(3*n+7)] // Vincenzo Librandi, Mar 26 2010
CROSSREFS
KEYWORD
nonn
AUTHOR
Zak Seidov, Nov 10 2006
STATUS
approved