A107013 Primes of the form x^2-xy+25y^2, with x and y nonnegative.

31, 37, 67, 97, 103, 157, 163, 181, 199, 223, 229, 313, 331, 367, 379, 397, 421, 433, 463, 487, 499, 577, 619, 631, 643, 661, 691, 709, 727, 751, 757, 823, 829, 859, 883, 907, 991, 1021, 1039, 1087, 1093, 1123, 1153, 1171, 1213, 1237, 1279, 1291, 1303

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[1, -1, 25, 10000] (* see A106856 *)

Crossrefs

Sequence in context: A215431 A082957 A067826 * A107012 A276305 A170853

Adjacent sequences: A107010 A107011 A107012 * A107014 A107015 A107016

Keyword

nonn,easy

Author

T. D. Noe, May 09 2005

Status

approved