A107009 Primes of the form 5x^2+xy+5y^2, with x and y nonnegative.

5, 11, 53, 71, 89, 137, 191, 257, 311, 353, 389, 419, 443, 467, 521, 647, 683, 797, 863, 929, 977, 1013, 1049, 1103, 1109, 1181, 1301, 1367, 1373, 1499, 1511, 1637, 1721, 1901, 1907, 2003, 2099, 2237, 2267, 2333, 2381, 2423, 2447, 2531, 2663

Offset

1,1

Comments

Discriminant=-99.

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

Crossrefs

Sequence in context: A089004 A197958 A094107 * A228865 A149527 A201180

Adjacent sequences: A107006 A107007 A107008 * A107010 A107011 A107012

Keyword

nonn,easy

Author

T. D. Noe, May 09 2005

Status

approved