A106965 Primes of the form 3x^2-2xy+7y^2, with x and y nonnegative.

3, 7, 43, 47, 83, 103, 107, 167, 223, 283, 347, 367, 443, 487, 503, 547, 607, 643, 683, 743, 823, 827, 863, 883, 887, 947, 967, 1063, 1223, 1303, 1307, 1423, 1427, 1487, 1523, 1607, 1627, 1663, 1667, 1723, 1747, 1787, 1987, 2063, 2083, 2203, 2267

Offset: 1

Author

T. D. Noe, May 09 2005

Keywords

• nonn
• easy

Comments

Discriminant=-80.

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)

Programs

Mathematica

QuadPrimes2[3, -2, 7, 10000] (* see A106856 *)