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A106977 Primes of the form 4x^2-3xy+6y^2, with x and y nonnegative. 1

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

%S 7,109,139,181,241,277,439,457,463,547,613,631,643,661,673,691,811,

%T 919,937,1051,1069,1093,1231,1321,1327,1543,1579,1657,1741,1747,2053,

%U 2083,2113,2269,2311,2437,2503,2539,2677,2731,2887,2953,2971,3049

%N Primes of the form 4x^2-3xy+6y^2, with x and y nonnegative.

%C Discriminant=-87.

%H Vincenzo Librandi and Ray Chandler, <a href="/A106977/b106977.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[4, -3, 6, 10000] (* see A106856 *)

%K nonn,easy

%O 1,1

%A _T. D. Noe_, May 09 2005

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Last modified July 15 15:53 EDT 2024. Contains 374333 sequences. (Running on oeis4.)