A106933 Primes of the form x^2-xy+17y^2, with x and y nonnegative.

17, 19, 23, 29, 37, 47, 59, 67, 71, 73, 83, 89, 103, 107, 127, 131, 149, 151, 157, 163, 167, 173, 181, 193, 199, 211, 223, 227, 241, 257, 263, 269, 277, 283, 293, 307, 317, 349, 359, 389, 397, 419, 421, 431, 439, 449, 457, 461, 467, 479, 491, 509, 523, 557

Offset: 1

Author

T. D. Noe, May 09 2005

Keywords

• nonn
• easy

Comments

Discriminant=-67.

Also, primes p such that Legendre(-67,p) = 0 or 1. - N. J. A. Sloane, Dec 25 2017

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[1, -1, 17, 10000] (* see A106856 *)