A106981 Primes of the form 2x^2+xy+11y^2, with x and y any integer.

2, 11, 17, 47, 89, 101, 113, 131, 251, 269, 293, 311, 317, 389, 443, 449, 503, 563, 569, 599, 641, 653, 659, 677, 743, 809, 839, 881, 887, 911, 947, 1013, 1061, 1091, 1163, 1181, 1187, 1259, 1307, 1319, 1361, 1373, 1409, 1487, 1511, 1523, 1583

Offset

1,1

Comments

Discriminant=-87.

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, 11, 10000], QuadPrimes2[2, -1, 11, 10000]] (* see A106856 *)

Crossrefs

Sequence in context: A236687 A187762 A217306 * A176985 A089592 A106982

Adjacent sequences: A106978 A106979 A106980 * A106982 A106983 A106984

Keyword

nonn,easy

Author

T. D. Noe, May 09 2005

Status

approved