OFFSET
1,2
COMMENTS
Also, positive numbers of the form x^2 + xy + 11y^2 (discriminant -43).
LINKS
N. J. A. Sloane et al., Binary Quadratic Forms and OEIS (Index to related sequences, programs, references)
PROG
(PARI) m=-43; select(x -> x, direuler(p=2, 101, 1/(1-(kronecker(m, p)*(X-X^2))-X)), 1) \\ Fixed by Andrey Zabolotskiy, Jul 30 2020
CROSSREFS
KEYWORD
nonn
AUTHOR
EXTENSIONS
More terms from Colin Barker, Jun 19 2014
STATUS
approved