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A107010
Primes of the form 5x^2+xy+5y^2, with x and y any integer.
1
5, 11, 23, 47, 53, 59, 71, 89, 113, 137, 179, 191, 251, 257, 269, 311, 317, 353, 383, 389, 401, 419, 443, 449, 467, 509, 521, 587, 599, 617, 641, 647, 653, 683, 719, 773, 797, 839, 863, 881, 911, 929, 947, 971, 977, 983, 1013, 1049, 1061, 1103, 1109
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
Union[QuadPrimes2[5, 1, 5, 10000], QuadPrimes2[5, -1, 5, 10000]] (* see A106856 *)
CROSSREFS
Sequence in context: A156109 A192954 A337437 * A175942 A181669 A362082
KEYWORD
nonn,easy
AUTHOR
T. D. Noe, May 09 2005
STATUS
approved