A106900 - OEIS

A106900

Primes of the form x^2+xy+12y^2, with x and y nonnegative.

83, 191, 197, 269, 439, 487, 523, 619, 823, 907, 947, 977, 1193, 1277, 1319, 1447, 1481, 1499, 1579, 1709, 1741, 1811, 1861, 1867, 2053, 2213, 2221, 2273, 2351, 2447, 2539, 2777, 2789, 2879, 2917, 2939, 2963, 3061, 3089, 3203, 3373, 3449

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

OFFSET

1,1

COMMENTS

Discriminant=-47.

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[1, 1, 12, 10000] (* see A106856 *)

CROSSREFS

Sequence in context: A142443 A044415 A044796 * A142621 A142681 A066366

Adjacent sequences: A106897 A106898 A106899 * A106901 A106902 A106903

KEYWORD

nonn,easy

AUTHOR

T. D. Noe, May 09 2005

STATUS

approved