A106879 Primes of the form 3x^2-xy+3y^2, with x and y nonnegative.

3, 5, 13, 47, 73, 103, 167, 227, 283, 293, 353, 367, 383, 433, 467, 503, 563, 577, 593, 677, 727, 797, 853, 857, 997, 1063, 1097, 1123, 1153, 1193, 1217, 1237, 1433, 1447, 1543, 1553, 1567, 1627, 1657, 1697, 1823, 1847, 1867, 1973, 1987, 1993, 2063

Offset

1,1

Comments

Discriminant=-35.

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[3, -1, 3, 10000] (* see A106856 *)

Crossrefs

Cf. A106878.

Sequence in context: A321358 A113606 A209002 * A249762 A264812 A276827

Adjacent sequences: A106876 A106877 A106878 * A106880 A106881 A106882

Keyword

nonn,easy

Author

T. D. Noe, May 09 2005

Status

approved