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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 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Intersection of A089033 and A089953. LINKS Harvey P. Dale, Table of n, a(n) for n = 1..1000 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 Cf. A089033, A089953, A124850. Sequence in context: A004655 A127101 A308832 * A056654 A020950 A056386 Adjacent sequences:  A124846 A124847 A124848 * A124850 A124851 A124852 KEYWORD nonn AUTHOR Zak Seidov, Nov 10 2006 STATUS approved

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Last modified December 10 00:54 EST 2019. Contains 329885 sequences. (Running on oeis4.)