A106886 Primes of the form 2x^2+xy+5y^2, with x and y any integer.

2, 5, 11, 41, 47, 59, 71, 83, 89, 137, 149, 167, 197, 227, 239, 281, 293, 317, 353, 359, 383, 401, 431, 449, 461, 479, 509, 557, 587, 593, 617, 683, 743, 761, 773, 821, 827, 839, 863, 929, 941, 947, 977, 983, 1019, 1061, 1097, 1103, 1151, 1163, 1181, 1217

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

Union[QuadPrimes2[2, 1, 5, 10000], QuadPrimes2[2, -1, 5, 10000]] (* see A106856 *)

Crossrefs

Primes in A243680.

Sequence in context: A276547 A065850 A191029 * A237814 A007700 A071313

Adjacent sequences: A106883 A106884 A106885 * A106887 A106888 A106889

Keyword

nonn,easy

Author

T. D. Noe, May 09 2005

Status

approved