A106958 Primes of the form 4x^2-xy+5y^2, with x and y nonnegative.

5, 19, 97, 131, 239, 277, 281, 347, 433, 569, 599, 641, 683, 773, 787, 839, 857, 911, 997, 1013, 1021, 1049, 1063, 1069, 1129, 1283, 1427, 1447, 1453, 1487, 1699, 1783, 1907, 1951, 2027, 2143, 2153, 2179, 2293, 2309, 2381, 2617, 2671, 2683, 2699

Offset

1,1

Comments

Discriminant=-79.

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, -1, 5, 10000] (* see A106856 *)

Crossrefs

Sequence in context: A263245 A346199 A020050 * A331336 A361278 A146144

Adjacent sequences: A106955 A106956 A106957 * A106959 A106960 A106961

Keyword

nonn,easy

Author

T. D. Noe, May 09 2005

Status

approved