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A106986 Primes of the form 5x^2+3xy+5y^2, with x and y any integers. 1
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 (list; graph; refs; listen; history; text; internal format)
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: A280266 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

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Last modified January 21 13:55 EST 2020. Contains 331113 sequences. (Running on oeis4.)