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Primes of the form x^2-xy+25y^2, with x and y nonnegative.

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`%I #17 Aug 05 2014 14:16:30
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`%S 31,37,67,97,103,157,163,181,199,223,229,313,331,367,379,397,421,433,
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`%T 463,487,499,577,619,631,643,661,691,709,727,751,757,823,829,859,883,
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`%U 907,991,1021,1039,1087,1093,1123,1153,1171,1213,1237,1279,1291,1303
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`%N Primes of the form x^2-xy+25y^2, with x and y nonnegative.
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`%C Discriminant=-99.
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`%H Vincenzo Librandi and Ray Chandler, <a href="/A107013/b107013.txt">Table of n, a(n) for n = 1..10000</a> [First 1000 terms from Vincenzo Librandi]
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`%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)
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`%t QuadPrimes2[1, -1, 25, 10000] (* see A106856 *)
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`%K nonn,easy
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`%O 1,1
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`%A _T. D. Noe_, May 09 2005
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