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Primes of the form 3x^2+xy+7y^2, with x and y nonnegative.
2

%I #17 Aug 05 2014 14:16:29

%S 3,7,11,37,59,61,113,151,197,313,317,353,419,463,499,563,593,733,757,

%T 859,881,907,929,941,977,997,1021,1033,1109,1123,1223,1237,1249,1283,

%U 1451,1481,1543,1559,1613,1741,1759,1811,1867,1877,1889,1901,1907

%N Primes of the form 3x^2+xy+7y^2, with x and y nonnegative.

%C Discriminant=-83.

%H Vincenzo Librandi and Ray Chandler, <a href="/A106966/b106966.txt">Table of n, a(n) for n = 1..10000</a> [First 1000 terms from Vincenzo Librandi]

%H N. J. A. Sloane et al., <a href="https://oeis.org/wiki/Binary_Quadratic_Forms_and_OEIS">Binary Quadratic Forms and OEIS</a> (Index to related sequences, programs, references)

%t QuadPrimes2[3, 1, 7, 10000] (* see A106856 *)

%K nonn,easy

%O 1,1

%A _T. D. Noe_, May 09 2005