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A106900 Primes of the form x^2+xy+12y^2, with x and y nonnegative. 2


%S 83,191,197,269,439,487,523,619,823,907,947,977,1193,1277,1319,1447,

%T 1481,1499,1579,1709,1741,1811,1861,1867,2053,2213,2221,2273,2351,

%U 2447,2539,2777,2789,2879,2917,2939,2963,3061,3089,3203,3373,3449

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

%C Discriminant=-47.

%H Vincenzo Librandi and Ray Chandler, <a href="/A106900/b106900.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[1, 1, 12, 10000] (* see A106856 *)

%K nonn,easy

%O 1,1

%A _T. D. Noe_, May 09 2005

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Last modified January 26 14:08 EST 2020. Contains 331280 sequences. (Running on oeis4.)