A106985 Primes of the form 5x^2+3xy+5y^2, with x and y nonnegative.

5, 13, 31, 59, 83, 97, 271, 307, 349, 353, 409, 479, 593, 643, 691, 733, 761, 839, 941, 983, 1151, 1217, 1259, 1307, 1567, 1601, 1721, 1861, 1867, 1879, 1931, 2113, 2243, 2273, 2309, 2351, 2371, 2663, 2719, 2749, 2777, 2803, 2819, 2897, 2953, 2957

Offset: 1

Author

T. D. Noe, May 09 2005

Keywords

• nonn
• easy

Comments

Discriminant=-91.

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