A106923 - OEIS

A106923

Primes of the form 4x^2+xy+4y^2, with x and y nonnegative.

43, 109, 151, 331, 337, 499, 751, 757, 907, 919, 1117, 1201, 1303, 1471, 1549, 1789, 2053, 2137, 2143, 2221, 2311, 2473, 2647, 2713, 3049, 3259, 3301, 3361, 3607, 3697, 3943, 4099, 4363, 4447, 4621, 4783, 4789, 5209, 5527, 5623, 5653, 5737

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

OFFSET

1,1

COMMENTS

Discriminant=-63.

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[4, 1, 4, 10000] (* see A106856 *)

CROSSREFS

Sequence in context: A334641 A059914 A141857 * A115586 A294717 A001133

Adjacent sequences: A106920 A106921 A106922 * A106924 A106925 A106926

KEYWORD

nonn,easy

AUTHOR

T. D. Noe, May 09 2005

STATUS

approved