A106892 Primes of the form 3x^2+2xy+4y^2, with x and y nonnegative.

3, 23, 37, 89, 113, 157, 179, 191, 317, 331, 379, 389, 433, 487, 509, 577, 643, 709, 751, 823, 859, 881, 971, 983, 1153, 1171, 1193, 1259, 1277, 1279, 1301, 1373, 1423, 1489, 1607, 1637, 1709, 1741, 1747, 1879, 2027, 2029, 2143, 2179, 2203, 2269

Offset: 1

Author

T. D. Noe, May 09 2005

Keywords

• nonn
• easy

Comments

Discriminant=-44.

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, 4, 10000] (* see A106856 *)