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A051992 Discriminants of real quadratic fields of ERD-type with class groups of exponent 2 and discriminants of the form D = r^2*k^2+4k, k odd. 9

%I #9 Sep 21 2021 15:46:23

%S 85,165,205,221,285,357,365,429,533,629,645,741,957,965,1085,1205,

%T 1245,1365,1469,1517,1533,1685,1853,1965,2013,2037,2045,2085,2373,

%U 2397,2405,2613,2805,2813,3005,3045,3237,3485,3885,3965,4245,4277

%N Discriminants of real quadratic fields of ERD-type with class groups of exponent 2 and discriminants of the form D = r^2*k^2+4k, k odd.

%C Excludes discriminants appearing in A051990.

%D R. A. Mollin, Quadratics, CRC Press, 1996, Appendix A, Table A4(3), column D.

%H Georg Fischer, <a href="/A051992/b051992.txt">Table of n, a(n) for n = 1..81</a>

%Y Cf. A051990, A051991, A051993, A051994, A051995, A051996, A051997, A051998.

%K nonn,fini,full

%O 1,1

%A _N. J. A. Sloane_, Jan 04 2000

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Last modified July 24 22:37 EDT 2024. Contains 374585 sequences. (Running on oeis4.)