A106956 Primes of the form 4x^2+xy+5y^2, with x and y nonnegative.

5, 23, 67, 73, 151, 269, 337, 421, 431, 439, 557, 593, 643, 733, 761, 887, 1117, 1171, 1229, 1249, 1319, 1381, 1511, 1543, 1667, 1811, 2063, 2099, 2213, 2333, 2389, 2467, 2539, 2549, 2609, 2707, 2741, 2801, 2927, 3067, 3169, 3191, 3343, 3391

Offset: 1

Author

T. D. Noe, May 09 2005

Keywords

• nonn
• easy

Comments

Discriminant=-79.

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, 1, 5, 10000] (* see A106856 *)