A106898 - OEIS

A106898

Primes of the form 2x^2+xy+6y^2.

2, 7, 53, 59, 61, 89, 97, 131, 157, 173, 263, 283, 331, 337, 353, 379, 431, 479, 491, 521, 541, 601, 613, 643, 647, 683, 709, 719, 739, 827, 883, 911, 941, 967, 991, 1021, 1087, 1093, 1117, 1129, 1181, 1217, 1229, 1231, 1367, 1399, 1427, 1489, 1493

(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

Union[QuadPrimes2[2, 1, 6, 10000], QuadPrimes2[2, -1, 6, 10000]] (* see A106856 *)

CROSSREFS

Primes in A243652.

Sequence in context: A275597 A118191 A005588 * A106899 A259530 A119772

Adjacent sequences: A106895 A106896 A106897 * A106899 A106900 A106901

KEYWORD

nonn,easy

AUTHOR

T. D. Noe, May 09 2005

STATUS

approved