A106885 - OEIS

A106885

Primes of the form 2x^2+xy+5y^2, with x and y nonnegative.

2, 5, 41, 59, 83, 89, 197, 227, 293, 359, 431, 479, 587, 617, 743, 821, 863, 929, 1019, 1061, 1151, 1163, 1181, 1217, 1289, 1367, 1373, 1451, 1487, 1571, 1601, 1607, 1619, 1697, 1709, 1877, 1913, 2099, 2243, 2309, 2333, 2351, 2399, 2423, 2459

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

OFFSET

1,1

COMMENTS

Discriminant=-39.

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[2, 1, 5, 10000] (* see A106856 *)

CROSSREFS

Sequence in context: A245242 A004096 A156152 * A072439 A286560 A002592

Adjacent sequences: A106882 A106883 A106884 * A106886 A106887 A106888

KEYWORD

nonn,easy

AUTHOR

T. D. Noe, May 09 2005

STATUS

approved