A003653 Discriminants of quadratic fields whose fundamental unit has norm -1. (Formerly M3781)

5, 8, 13, 17, 29, 37, 40, 41, 53, 61, 65, 73, 85, 89, 97, 101, 104, 109, 113, 137, 145, 149, 157, 173, 181, 185, 193, 197, 229, 232, 233, 241, 257, 265, 269, 277, 281, 293, 296, 313, 317, 328, 337, 349, 353, 365, 373, 389, 397, 401, 409, 421, 424, 433, 445, 449

Offset

1,1

References

D. A. Buell, Binary Quadratic Forms. Springer-Verlag, NY, 1989, pp. 224-241.

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

Links

Table of n, a(n) for n=1..56.

Crossrefs

Cf. A003658, A349649 (discriminants of real quadratic fields whose fundamental unit has norm 1).

Sequence in context: A314432 A314433 A314434 * A003655 A082823 A143747

Adjacent sequences: A003650 A003651 A003652 * A003654 A003655 A003656

Keyword

nonn

Author

N. J. A. Sloane, Mira Bernstein

Status

approved