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

%I #18 Aug 05 2014 14:16:29

%S 3,19,59,107,163,211,251,347,419,499,571,587,619,659,883,907,947,1051,

%T 1171,1259,1283,1459,1483,1499,1579,1627,1747,1907,1931,1987,2003,

%U 2083,2179,2203,2347,2411,2459,2467,2531,2539,2707,2803,2819,2963

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

%C Discriminant=-32.

%H Vincenzo Librandi and Ray Chandler, <a href="/A106875/b106875.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, 2, 3, 10000] (* see A106856 *)

%Y Cf. A243177, A007520.

%K nonn,easy

%O 1,1

%A _T. D. Noe_, May 09 2005