A051980 Discriminants of real quadratic fields with class number 2 and related continued fraction period length of 15.

481, 1417, 1466, 2858, 3065, 3589, 3785, 3977, 4538, 5317, 5941, 6641, 6749, 7082, 11861, 12701, 12833, 13793, 14909, 16589, 17153, 18185, 18365, 18581, 20885, 24221, 27989, 29069, 32885, 33365, 44813, 47165, 51173, 66197, 67973, 70493, 78917

Offset: 1

Author

N. J. A. Sloane, Jan 04 2000

Keywords

• nonn
• fini
• full

References

• R. A. Mollin, Quadratics, CRC Press, 1996, Appendix A, Table A3.

Crossrefs

Cf. A051966-A051989.

Extensions

a(16)=24221 and a(37) inserted by Georg Fischer, Sep 21 2021