A106901 Primes of the form 3x^2+3xy+5y^2, with x and y nonnegative.

3, 5, 11, 23, 29, 41, 131, 167, 173, 197, 233, 269, 311, 317, 347, 401, 419, 431, 449, 479, 503, 617, 641, 653, 677, 683, 743, 821, 827, 839, 857, 887, 911, 929, 947, 983, 1013, 1031, 1049, 1061, 1151, 1187, 1193, 1217, 1367, 1433, 1439, 1451, 1493

Offset: 1

Author

T. D. Noe, May 09 2005

Keywords

• nonn
• easy

Comments

Discriminant=-51.

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, 3, 5, 10000] (* see A106856 *)