OFFSET
1,1
COMMENTS
Discriminant = -67.
Different from A191041: 151 decomposes in Q(sqrt(-67)) since 151 = ((1 + 3*sqrt(-67))/2) * ((1 - 3*sqrt(-67))/2); nevertheless, x^2 + xy + 17y^2 = 151 has no nonnegative solution. - Jianing Song, Feb 19 2021
LINKS
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, 17, 10000] (* see A106856 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
T. D. Noe, May 09 2005
STATUS
approved