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A106965 Primes of the form 3x^2-2xy+7y^2, with x and y nonnegative. 2

%I

%S 3,7,43,47,83,103,107,167,223,283,347,367,443,487,503,547,607,643,683,

%T 743,823,827,863,883,887,947,967,1063,1223,1303,1307,1423,1427,1487,

%U 1523,1607,1627,1663,1667,1723,1747,1787,1987,2063,2083,2203,2267

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

%C Discriminant=-80.

%H Vincenzo Librandi and Ray Chandler, <a href="/A106965/b106965.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, 7, 10000] (* see A106856 *)

%K nonn,easy

%O 1,1

%A _T. D. Noe_, May 09 2005

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Last modified December 8 02:41 EST 2021. Contains 349590 sequences. (Running on oeis4.)