A106946 Primes of the form 2x^2+xy+9y^2, with x and y any integer.

2, 19, 37, 83, 101, 199, 223, 233, 251, 277, 311, 313, 431, 463, 547, 571, 641, 719, 797, 821, 829, 839, 929, 941, 983, 1019, 1097, 1129, 1303, 1327, 1381, 1399, 1447, 1499, 1511, 1549, 1669, 1709, 1733, 1753, 1777, 1847, 1933, 1997, 2003, 2063

Offset

1,1

Comments

Discriminant=-71.

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, 9, 10000], QuadPrimes2[2, -1, 9, 10000]] (* see A106856 *)

Crossrefs

Sequence in context: A103058 A161442 A135834 * A240552 A107143 A018610

Adjacent sequences: A106943 A106944 A106945 * A106947 A106948 A106949

Keyword

nonn,easy

Author

T. D. Noe, May 09 2005

Status

approved