A106992 - OEIS

A106992

Primes of the form 4x^2+xy+6y^2, with x and y nonnegative.

11, 61, 271, 499, 571, 631, 769, 881, 1031, 1061, 1069, 1279, 1301, 1871, 1999, 2069, 2221, 2239, 2381, 2531, 2671, 2851, 2969, 3079, 3089, 3361, 3389, 3659, 3779, 3881, 3911, 4111, 4159, 4241, 4409, 4721, 4751, 4759, 5059, 5261, 5519

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

OFFSET

1,1

COMMENTS

Discriminant=-95.

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, 6, 10000] (* see A106856 *)

CROSSREFS

Sequence in context: A089764 A023298 A320145 * A115565 A137410 A268863

Adjacent sequences: A106989 A106990 A106991 * A106993 A106994 A106995

KEYWORD

nonn,easy

AUTHOR

T. D. Noe, May 09 2005

STATUS

approved