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A106916 Primes of the form 3x^2-2xy+5y^2, with x and y nonnegative. 1

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

%S 3,5,13,19,83,101,139,173,181,227,229,251,269,307,419,467,509,563,619,

%T 643,733,773,797,811,829,941,971,1021,1069,1123,1181,1259,1291,1307,

%U 1483,1531,1613,1627,1637,1669,1693,1741,1861,1867,1907,1931,1949

%N Primes of the form 3x^2-2xy+5y^2, with x and y nonnegative.

%C Discriminant=-56.

%H Vincenzo Librandi and Ray Chandler, <a href="/A106916/b106916.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[3, -2, 5, 10000] (* see A106856 *)

%K nonn,easy

%O 1,1

%A _T. D. Noe_, May 09 2005

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Last modified April 25 06:35 EDT 2024. Contains 371964 sequences. (Running on oeis4.)