A051978 Discriminants of real quadratic fields with class number 2 and related continued fraction period length of 13.

746, 778, 1082, 1241, 1514, 1649, 2042, 2426, 3085, 3338, 3349, 4058, 4573, 4589, 4885, 5389, 7418, 7421, 8765, 9389, 9965, 10085, 12965, 14837, 16277, 17533, 19357, 21053, 22373, 25877, 30733, 31373, 31853, 36965, 38597, 39437, 40757, 53477, 69893, 81413

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(37) and following from Georg Fischer, Sep 21 2021