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Discriminants of real quadratic fields of ERD-type with class groups of exponent 2 and discriminants of the form D = r^2*k^2+k, k odd.
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%I #9 Sep 21 2021 15:45:32

%S 10,15,26,30,35,39,42,65,78,95,105,110,122,143,170,182,195,203,210,

%T 222,230,255,290,327,362,395,462,483,485,530,663,885,903,915,930,962,

%U 1155,1157,1173,1190,1218,1230,1295,1370,1463,1482,1518,1595

%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+k, k odd.

%D R. A. Mollin, Quadratics, CRC Press, 1996, Appendix A, Table A4(1), column D.

%H Georg Fischer, <a href="/A051990/b051990.txt">Table of n, a(n) for n = 1..98</a>

%Y Cf. A051991, A051992, A051993, A051994, A051995, A051996, A051997, A051998.

%K nonn,fini,full

%O 1,1

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