A106909 Primes of the form 4x^2-3xy+4y^2, with x and y nonnegative.

5, 31, 89, 179, 191, 331, 419, 421, 449, 599, 641, 859, 991, 1021, 1039, 1109, 1259, 1291, 1301, 1489, 1549, 1621, 1871, 2011, 2099, 2311, 2381, 2539, 2689, 2909, 3041, 3169, 3301, 3331, 3389, 3391, 3821, 3919, 3931, 4019, 4211, 4229, 4261

Offset

1,1

Comments

Discriminant=-55.

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)

Mathematica

QuadPrimes2[4, -3, 4, 10000] (* see A106856 *)

Crossrefs

Sequence in context: A102732 A213068 A138657 * A304659 A115519 A211923

Adjacent sequences: A106906 A106907 A106908 * A106910 A106911 A106912

Keyword

nonn,easy

Author

T. D. Noe, May 09 2005

Status

approved