A106934 Primes of the form 3x^2+2xy+6y^2, with x and y nonnegative.

3, 11, 31, 107, 163, 167, 199, 211, 311, 367, 431, 439, 547, 643, 751, 787, 811, 887, 907, 911, 983, 1187, 1367, 1399, 1423, 1523, 1571, 1663, 1847, 1867, 1907, 1931, 1979, 1999, 2063, 2203, 2207, 2251, 2339, 2459, 2579, 2591, 2647, 2659, 2663

Offset: 1

Author

T. D. Noe, May 09 2005

Keywords

• nonn
• easy

Comments

Discriminant=-68.

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, 6, 10000] (* see A106856 *)