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


(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A106995 Primes of the form 3x^2+xy+8y^2, with x and y nonnegative. 1


%S 3,37,167,193,223,293,523,563,827,857,863,1063,1123,1153,1307,1637,

%T 1747,2003,2203,2273,2333,2423,2617,2767,2917,2963,3187,3257,3527,

%U 3613,3623,3643,3793,3943,3967,4003,4057,4133,4397,4663,4673,4877

%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="/A106995/b106995.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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified January 26 13:09 EST 2022. Contains 350598 sequences. (Running on oeis4.)