|
%I #17 Sep 08 2022 08:45:33
%S 2,43,47,67,83,103,127,223,263,307,383,443,463,467,523,563,587,647,
%T 727,863,883,967,1063,1087,1103,1123,1223,1283,1307,1327,1427,1447,
%U 1483,1487,1543,1583,1607,1667,1747,1783,1787,1823,1987,2027,2083
%N Primes of the form 2x^2+2xy+43y^2.
%C Discriminant=-340. See A139827 for more information.
%H Vincenzo Librandi and Ray Chandler, <a href="/A139835/b139835.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)
%F The primes are congruent to {2, 43, 47, 67, 83, 87, 103, 123, 127, 183, 203, 223, 247, 263, 287, 307, 327} (mod 340).
%t QuadPrimes2[2, -2, 43, 10000] (* see A106856 *)
%o (Magma) [ p: p in PrimesUpTo(3000) | p mod 340 in {2, 43, 47, 67, 83, 87, 103, 123, 127, 183, 203, 223, 247, 263, 287, 307, 327}]; // _Vincenzo Librandi_, Jul 29 2012
%K nonn,easy
%O 1,1
%A _T. D. Noe_, May 02 2008
|
