A106875 - OEIS

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

A106875

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

3, 19, 59, 107, 163, 211, 251, 347, 419, 499, 571, 587, 619, 659, 883, 907, 947, 1051, 1171, 1259, 1283, 1459, 1483, 1499, 1579, 1627, 1747, 1907, 1931, 1987, 2003, 2083, 2179, 2203, 2347, 2411, 2459, 2467, 2531, 2539, 2707, 2803, 2819, 2963

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Discriminant=-32.

LINKS

Vincenzo Librandi and Ray Chandler, Table of n, a(n) for n = 1..10000 [First 1000 terms from Vincenzo Librandi]

N. J. A. Sloane et al., Binary Quadratic Forms and OEIS (Index to related sequences, programs, references)

MATHEMATICA

QuadPrimes2[3, 2, 3, 10000] (* see A106856 *)

CROSSREFS

Cf. A243177, A007520.

Sequence in context: A027272 A337648 A164132 * A215646 A182353 A012863

Adjacent sequences: A106872 A106873 A106874 * A106876 A106877 A106878

KEYWORD

nonn,easy

AUTHOR

T. D. Noe, May 09 2005

STATUS

approved