A349649 Discriminants of real quadratic fields whose fundamental unit has norm 1.

12, 21, 24, 28, 33, 44, 56, 57, 60, 69, 76, 77, 88, 92, 93, 105, 120, 124, 129, 133, 136, 140, 141, 152, 156, 161, 165, 168, 172, 177, 184, 188, 201, 204, 205, 209, 213, 217, 220, 221, 236, 237, 248, 249, 253, 264, 268, 273, 280, 284, 285, 301, 305, 309, 312, 316

Offset: 1

Author

Arkadiusz Wesolowski, Nov 23 2021

Keywords

• nonn

References

• D. A. Buell, Binary Quadratic Forms, Springer-Verlag, NY, 1989, pp. 92-93.
• Paulo Ribenboim, My Numbers, My Friends: Popular Lectures on Number Theory, Springer-Verlag, NY, 2000, p. 151.

Links

• Index entries for sequences related to quadratic fields

Crossrefs

Cf. A003658, A003653 (discriminants of real quadratic fields whose fundamental unit has norm -1).

Cf. A003656, A327297 (a subsequence).

Programs

PARI

isok(D) = isfundamental(D) && norm(quadunit(D))==1;