A106973 - OEIS

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

%S 5,17,41,257,269,293,353,509,521,677,761,797,857,881,929,941,1097,

%T 1109,1181,1217,1361,1433,1553,1613,1637,1721,1949,2141,2273,2357,

%U 2477,2609,2693,2777,2789,2861,2897,3041,3209,3449,3461,3533,3821

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

%C Discriminant=-84.

%H Vincenzo Librandi and Ray Chandler, <a href="/A106973/b106973.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[5, -4, 5, 10000] (* see A106856 *)

%K nonn,easy

%O 1,1

%A _T. D. Noe_, May 09 2005