A106953 Primes of the form 4x^2+2xy+5y^2, with x and y nonnegative.

5, 11, 47, 73, 139, 191, 229, 263, 277, 283, 347, 349, 457, 461, 541, 613, 631, 719, 727, 757, 821, 881, 883, 1013, 1049, 1061, 1087, 1103, 1201, 1223, 1303, 1451, 1483, 1487, 1493, 1531, 1567, 1583, 1601, 1621, 1697, 1733, 1759, 1811, 1847

Offset: 1

Author

T. D. Noe, May 09 2005

Keywords

• nonn
• easy

Comments

Discriminant=-76.

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, 2, 5, 10000] (* see A106856 *)