%I #20 Aug 05 2014 14:16:29

%S 7,13,19,31,37,43,67,73,79,97,103,127,139,151,157,163,181,193,199,211,

%T 223,229,241,271,277,283,307,313,349,367,373,379,397,409,421,439,457,

%U 463,487,499,523,541,571,577,601,607,613,619,631,643,661,673,709,727

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

%C Discriminant=-27.

%H Vincenzo Librandi and Ray Chandler, <a href="/A106870/b106870.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[1, 1, 7, 10000] (* see A106856 *)

%Y Cf. A243175, A002476.

%K nonn,easy

%O 1,1

%A _T. D. Noe_, May 09 2005