%I A046020
%S A046020 647,1039,1103,1279,1447,1471,1811,1979,2411,2671,3491,3539,3847,3923,
%T A046020 4211,4783,5387,5507,5531,6563,6659,6703,7043,9587,9931,10867,10883,
%U A046020 12203,12739,13099,13187,15307,15451,16267,17203,17851,18379,20323
%N A046020 Discriminants of imaginary quadratic fields with class number 23 (negated).
%D A046020 Buell, D. A. ``Small Class Numbers and Extreme Values of L-Functions 
               of Quadratic Fields.'' Math. Comput. 139, 786-796, 1977.
%D A046020 Wagner, C. ``Class Number 5, 6 and 7.'' Math. Comput. 65, 785-800, 1996.
%H A046020 S. Arno, M. L. Robinson and F. S. Wheller, <a href="http://www.math.uiuc.edu/
               Algebraic-Number-Theory/0009/">Imaginary Quadratic Fields with Small 
               Odd Class Number</a>
%H A046020 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               ClassNumber.html">Link to a section of The World of Mathematics.</
               a>
%H A046020 <a href="Sindx_Qua.html#quadfield">Index entries for sequences related 
               to quadratic fields</a>
%Y A046020 Cf. A006203, A013658, A014602, A014603, A046002-A046020.
%Y A046020 Sequence in context: A063844 A067845 A057942 this_sequence A108821 A035885 
               A114827
%Y A046020 Adjacent sequences: A046017 A046018 A046019 this_sequence A046021 A046022 
               A046023
%K A046020 nonn,fini
%O A046020 1,1
%A A046020 Eric Weisstein (eric(AT)weisstein.com)
%E A046020 68 discriminants in this sequence (proved).