A107010 - OEIS

A107010

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

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

(list; graph; refs; listen; history; text; internal format)

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

Adjacent sequences: A107007 A107008 A107009 * A107011 A107012 A107013

KEYWORD

nonn,easy

AUTHOR

T. D. Noe, May 09 2005

STATUS

approved