login

Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.

Primes of the form 2x^2-xy+8y^2, with x and y nonnegative.
1

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

%S 2,23,53,71,107,149,197,239,263,281,317,389,443,491,557,569,599,641,

%T 653,683,827,953,977,1031,1061,1163,1289,1439,1451,1481,1499,1523,

%U 1607,1619,1667,1709,1787,1871,1877,1901,2069,2111,2129,2153,2213

%N Primes of the form 2x^2-xy+8y^2, with x and y nonnegative.

%C Discriminant=-63.

%H Vincenzo Librandi and Ray Chandler, <a href="/A106928/b106928.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[2, -1, 8, 10000] (* see A106856 *)

%K nonn,easy

%O 1,1

%A _T. D. Noe_, May 09 2005