A106986 Primes of the form 5x^2+3xy+5y^2, with x and y any integers.

5, 7, 13, 19, 31, 41, 47, 59, 73, 83, 89, 97, 167, 223, 227, 229, 241, 271, 293, 307, 349, 353, 383, 397, 409, 461, 479, 509, 577, 587, 593, 619, 643, 661, 691, 733, 761, 769, 773, 787, 811, 839, 853, 929, 941, 983, 1021, 1097, 1123, 1151, 1181, 1217

Offset

1,1

Comments

Discriminant=-91.

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[5, 3, 5, 10000], QuadPrimes2[5, -3, 5, 10000]] (* see A106856 *)

Crossrefs

Sequence in context: A370008 A243457 A189441 * A218011 A242255 A006512

Adjacent sequences: A106983 A106984 A106985 * A106987 A106988 A106989

Keyword

nonn,easy

Author

T. D. Noe, May 09 2005

Status

approved