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Primes of the form x^2-xy+25y^2, with x and y nonnegative.
3

%I #17 Aug 05 2014 14:16:30

%S 31,37,67,97,103,157,163,181,199,223,229,313,331,367,379,397,421,433,

%T 463,487,499,577,619,631,643,661,691,709,727,751,757,823,829,859,883,

%U 907,991,1021,1039,1087,1093,1123,1153,1171,1213,1237,1279,1291,1303

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

%C Discriminant=-99.

%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]

%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, 25, 10000] (* see A106856 *)

%K nonn,easy

%O 1,1

%A _T. D. Noe_, May 09 2005