A051986 Discriminants of real quadratic fields with class number 2 and related continued fraction period length of 21.

394, 865, 1769, 1985, 2561, 2762, 3098, 4385, 5465, 5485, 5965, 6122, 7141, 7265, 10565, 11101, 11485, 11581, 13285, 13466, 14381, 14765, 16442, 21365, 22565, 28373, 34493, 35197, 36221, 44861, 47477, 48485, 48941, 51365, 54317

Offset

1,1

References

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

Links

Georg Fischer, Table of n, a(n) for n = 1..59

Crossrefs

Cf. A051966-A051989.

Sequence in context: A172710 A236234 A252691 * A223908 A251256 A270843

Adjacent sequences: A051983 A051984 A051985 * A051987 A051988 A051989

Keyword

nonn,fini,full

Author

N. J. A. Sloane, Jan 04 2000

Status

approved