A106884 - OEIS

%I #19 Aug 05 2014 14:16:29

%S 3,13,61,79,127,199,211,283,313,337,373,433,571,601,727,757,829,859,

%T 883,907,919,937,1069,1093,1213,1291,1297,1303,1327,1447,1531,1543,

%U 1609,1621,1663,1699,1741,1777,1873,2053,2083,2089,2161,2239,2341

%N Primes of the form 3x^2-3xy+4y^2, with x and y nonnegative.

%C Discriminant=-39.

%H Vincenzo Librandi and Ray Chandler, <a href="/A106884/b106884.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, 4, 10000] (* see A106856 *)

%Y Primes in A243681.

%K nonn,easy

%O 1,1

%A _T. D. Noe_, May 09 2005