The OEIS is supported by the many generous donors to the OEIS Foundation.


(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A106997 Primes of the form 3x^2-xy+8y^2, with x and y nonnegative. 1


%S 3,53,97,127,257,373,547,677,683,743,787,797,877,953,1367,1553,1667,

%T 1693,1777,1913,2027,2083,2207,2347,2803,2833,2887,3167,3343,3373,

%U 3637,3727,3803,3833,3853,3907,3917,4093,4217,4327,4373,4517,4733

%N Primes of the form 3x^2-xy+8y^2, with x and y nonnegative.

%C Discriminant=-95.

%H Vincenzo Librandi and Ray Chandler, <a href="/A106997/b106997.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, -1, 8, 10000] (* see A106856 *)

%K nonn,easy

%O 1,1

%A _T. D. Noe_, May 09 2005

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 20 01:04 EDT 2022. Contains 353847 sequences. (Running on oeis4.)