A106943 Primes of the form 3x^2+xy+6y^2, with x and y any integer.

3, 29, 89, 103, 109, 151, 157, 191, 271, 379, 409, 419, 499, 503, 557, 587, 593, 613, 659, 677, 787, 853, 857, 977, 1031, 1069, 1103, 1181, 1193, 1237, 1297, 1321, 1493, 1523, 1531, 1571, 1619, 1637, 1657, 1693, 1723, 1787, 1871, 1873, 1949, 1993

Offset

1,1

Comments

Discriminant=-71.

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

Union[QuadPrimes2[3, 1, 6, 10000], QuadPrimes2[3, -1, 6, 10000]] (* see A106856 *)

Crossrefs

Sequence in context: A087210 A288918 A190942 * A281712 A106942 A211621

Adjacent sequences: A106940 A106941 A106942 * A106944 A106945 A106946

Keyword

nonn,easy

Author

T. D. Noe, May 09 2005

Status

approved