A106910 Primes of the form 2x^2+xy+7y^2, with x and y nonnegative.

2, 7, 17, 43, 107, 193, 227, 277, 293, 307, 457, 523, 593, 613, 673, 827, 857, 877, 967, 997, 1063, 1097, 1117, 1217, 1223, 1283, 1447, 1493, 1613, 1627, 1657, 1663, 1667, 1693, 1733, 1823, 1867, 1877, 2087, 2153, 2207, 2243, 2287, 2383, 2393

Offset

1,1

Comments

Discriminant=-55.

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, 7, 10000] (* see A106856 *)

Crossrefs

Sequence in context: A175120 A393177 A239357 * A108479 A178441 A014742

Adjacent sequences: A106907 A106908 A106909 * A106911 A106912 A106913

Keyword

nonn,easy

Author

T. D. Noe, May 09 2005

Status

approved