A106975 Primes of the form 4x^2+3xy+6y^2, with x and y nonnegative.

13, 67, 199, 223, 313, 499, 523, 991, 1009, 1021, 1153, 1213, 1399, 1483, 1669, 1789, 1831, 1861, 1879, 2089, 2137, 2287, 2377, 2551, 2713, 2797, 2833, 3061, 3271, 3319, 3457, 3583, 3823, 3853, 3943, 4027, 4051, 4177, 4789, 5011, 5023

Offset: 1

Author

T. D. Noe, May 09 2005

Keywords

• nonn
• easy

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)

Programs

Mathematica

QuadPrimes2[4, 3, 6, 10000] (* see A106856 *)