A106884 Primes of the form 3x^2-3xy+4y^2, with x and y nonnegative.

3, 13, 61, 79, 127, 199, 211, 283, 313, 337, 373, 433, 571, 601, 727, 757, 829, 859, 883, 907, 919, 937, 1069, 1093, 1213, 1291, 1297, 1303, 1327, 1447, 1531, 1543, 1609, 1621, 1663, 1699, 1741, 1777, 1873, 2053, 2083, 2089, 2161, 2239, 2341

Offset

1,1

Comments

Discriminant=-39.

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

Crossrefs

Primes in A243681.

Sequence in context: A292796 A020007 A112731 * A232611 A238445 A355298

Adjacent sequences: A106881 A106882 A106883 * A106885 A106886 A106887

Keyword

nonn,easy

Author

T. D. Noe, May 09 2005

Status

approved