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A051985 Discriminants of real quadratic fields with class number 2 and related continued fraction period length of 20. 0
511, 559, 606, 790, 1002, 1065, 1079, 1182, 1195, 1374, 1415, 1510, 1513, 1537, 1603, 1687, 1961, 2193, 2215, 2455, 2471, 2627, 2863, 3155, 3239, 3295, 3383, 3647, 3746, 3857, 4163, 4295, 4458, 4535, 4595, 4727, 4782, 4847, 4922, 5038 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

REFERENCES

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

LINKS

Table of n, a(n) for n=1..40.

CROSSREFS

Cf. A051966-A051989.

Sequence in context: A027494 A145588 A242218 * A103206 A277172 A023691

Adjacent sequences:  A051982 A051983 A051984 * A051986 A051987 A051988

KEYWORD

nonn,fini

AUTHOR

N. J. A. Sloane, Jan 04 2000

STATUS

approved

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Last modified April 6 12:08 EDT 2020. Contains 333273 sequences. (Running on oeis4.)