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Primes of the form 3x^2+2xy+6y^2, with x and y any integer.
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%I #17 Aug 05 2014 14:16:29

%S 3,7,11,23,31,71,79,107,131,139,163,167,199,211,227,283,311,347,367,

%T 379,419,431,439,479,487,499,503,547,571,607,619,643,683,691,719,743,

%U 751,787,811,823,827,839,887,907,911,947,983,991,1031,1051,1091,1151

%N Primes of the form 3x^2+2xy+6y^2, with x and y any integer.

%C Discriminant=-68.

%H Vincenzo Librandi and Ray Chandler, <a href="/A106935/b106935.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 Union[QuadPrimes2[3, 2, 6, 10000], QuadPrimes2[3, -2, 6, 10000]] (* see A106856 *)

%K nonn,easy

%O 1,1

%A _T. D. Noe_, May 09 2005