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A106920 Primes of the form 3x^2-xy+5y^2, with x and y nonnegative. 1

%I #17 Aug 05 2014 14:16:29

%S 3,5,7,29,41,79,107,127,137,199,239,241,251,277,311,433,491,499,577,

%T 593,599,643,647,653,661,709,757,853,877,907,971,1039,1051,1069,1087,

%U 1091,1097,1259,1301,1307,1319,1423,1451,1543,1579,1583,1597,1609

%N Primes of the form 3x^2-xy+5y^2, with x and y nonnegative.

%C Discriminant=-59.

%H Vincenzo Librandi and Ray Chandler, <a href="/A106920/b106920.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, -1, 5, 10000] (* see A106856 *)

%K nonn,easy

%O 1,1

%A _T. D. Noe_, May 09 2005

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Last modified April 19 10:28 EDT 2024. Contains 371782 sequences. (Running on oeis4.)