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A106981
Primes of the form 2x^2+xy+11y^2, with x and y any integer.
1
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
KEYWORD
nonn,easy
AUTHOR
T. D. Noe, May 09 2005
STATUS
approved