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A106956 Primes of the form 4x^2+xy+5y^2, with x and y nonnegative. 2


%S 5,23,67,73,151,269,337,421,431,439,557,593,643,733,761,887,1117,1171,

%T 1229,1249,1319,1381,1511,1543,1667,1811,2063,2099,2213,2333,2389,

%U 2467,2539,2549,2609,2707,2741,2801,2927,3067,3169,3191,3343,3391

%N Primes of the form 4x^2+xy+5y^2, with x and y nonnegative.

%C Discriminant=-79.

%H Vincenzo Librandi and Ray Chandler, <a href="/A106956/b106956.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[4, 1, 5, 10000] (* see A106856 *)

%K nonn,easy

%O 1,1

%A _T. D. Noe_, May 09 2005

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Last modified January 24 21:08 EST 2022. Contains 350565 sequences. (Running on oeis4.)