A106978 - OEIS

A106978

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

3, 41, 137, 191, 263, 359, 461, 479, 617, 797, 827, 971, 983, 1229, 1439, 1481, 1493, 1613, 1697, 1721, 1787, 2099, 2339, 2381, 2393, 2531, 2621, 2729, 2753, 2939, 2999, 3347, 3407, 3449, 3767, 3797, 3917, 4139, 4481, 4493, 4679, 4889, 5087

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

OFFSET

1,1

COMMENTS

Discriminant=-87.

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, 3, 8, 10000] (* see A106856 *)

CROSSREFS

Sequence in context: A289270 A262555 A343814 * A260832 A089131 A057650

Adjacent sequences: A106975 A106976 A106977 * A106979 A106980 A106981

KEYWORD

nonn,easy

AUTHOR

T. D. Noe, May 09 2005

STATUS

approved