A106931 Primes of the form 4x^2+4xy+5y^2, with x and y nonnegative.

5, 13, 29, 53, 61, 149, 157, 173, 181, 229, 269, 277, 293, 317, 389, 397, 421, 461, 541, 557, 613, 653, 661, 709, 733, 773, 821, 829, 853, 877, 941, 997, 1013, 1061, 1093, 1109, 1117, 1213, 1229, 1301, 1373, 1429, 1549, 1597, 1621, 1637, 1693

Offset: 1

Author

T. D. Noe, May 09 2005

Keywords

• nonn
• easy

Comments

Discriminant=-64.

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, 4, 5, 10000] (* see A106856 *)