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A106999 Primes of the form 2x^2+xy+12y^2, with x and y any integer. 1

%I #20 Aug 05 2014 14:16:30

%S 2,13,67,103,107,113,173,227,307,317,337,383,433,487,607,673,773,887,

%T 907,977,983,1093,1097,1117,1193,1237,1283,1427,1433,1447,1523,1627,

%U 1663,1723,1823,1877,1933,1997,2017,2143,2237,2293,2377,2383,2393

%N Primes of the form 2x^2+xy+12y^2, with x and y any integer.

%C Discriminant=-95.

%H Vincenzo Librandi and Ray Chandler, <a href="/A106999/b106999.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 Union[QuadPrimes2[2, 1, 12, 10000], QuadPrimes2[2, -1, 12, 10000]] (* see A106856 *)

%K nonn,easy

%O 1,1

%A _T. D. Noe_, May 09 2005

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Last modified April 24 08:48 EDT 2024. Contains 371930 sequences. (Running on oeis4.)