A035258 Positive integers of the form 2x^2+xy-2y^2 (discriminant 17).

1, 2, 4, 8, 9, 13, 16, 17, 18, 19, 25, 26, 32, 34, 36, 38, 43, 47, 49, 50, 52, 53, 59, 64, 67, 68, 72, 76, 81, 83, 86, 89, 94, 98, 100, 101, 103, 104, 106, 117, 118, 121, 127, 128, 134, 136, 137, 144, 149, 151, 152, 153, 157, 162, 166, 169, 171, 172, 178

Offset: 1

Author

N. J. A. Sloane

Keywords

• nonn

Comments

Also, indices of the nonzero terms in expansion of Dirichlet series Product_p (1-(Kronecker(m,p)+1)*p^(-s)+Kronecker(m,p)*p^(-2s))^(-1) for m= 17.

Links

• N. J. A. Sloane et al., Binary Quadratic Forms and OEIS (Index to related sequences, programs, references)

Crossrefs

Primes: A038889.

Cf. A035199.

Programs

PARI

m=17; select(x -> x, direuler(p=2,101,1/(1-(kronecker(m,p)*(X-X^2))-X)), 1) \\ Fixed by Andrey Zabolotskiy, Jul 30 2020

Extensions

Entry revised by N. J. A. Sloane, Jun 01 2014

More terms from Colin Barker, Jun 17 2014