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A106951 Primes of the form 3x^2+3xy+7y^2, with x and y nonnegative. 2


%S 3,7,13,37,43,67,73,97,127,193,223,277,283,337,367,373,397,433,457,

%T 463,487,523,547,577,607,613,643,727,733,787,823,853,877,883,907,937,

%U 967,997,1033,1087,1123,1153,1213,1297,1303,1327,1423,1447,1453,1483

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

%C Discriminant=-75.

%H Vincenzo Librandi and Ray Chandler, <a href="/A106951/b106951.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, 3, 7, 10000] (* see A106856 *)

%K nonn,easy

%O 1,1

%A _T. D. Noe_, May 09 2005

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Last modified October 15 21:38 EDT 2021. Contains 348034 sequences. (Running on oeis4.)