A106918 Primes of the form 3x^2+xy+5y^2, with x and y nonnegative.

3, 5, 19, 53, 167, 181, 193, 257, 263, 271, 281, 293, 307, 331, 359, 379, 449, 487, 523, 557, 607, 617, 619, 761, 829, 883, 911, 947, 997, 1031, 1049, 1187, 1231, 1303, 1433, 1487, 1523, 1549, 1553, 1667, 1669, 1759, 1811, 1889, 1933, 1973, 1993

Offset

1,1

Comments

Discriminant=-59.

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

Crossrefs

Sequence in context: A360086 A127998 A174132 * A182357 A181519 A380767

Adjacent sequences: A106915 A106916 A106917 * A106919 A106920 A106921

Keyword

nonn,easy

Author

T. D. Noe, May 09 2005

Status

approved