%I A094619
%S A094619 40,60,65,85,104,105,120,136,140,156,165,168,185,204,205,220,221,232,
%T A094619 264,265,273,280,285,296,305,312,345,348,357,364,365,377,380,385,408,
%U A094619 424,429,440,444,456,460,465,476,481,485,488,492,493,533,545,552,561
%N A094619 Discriminants of real quadratic number fields with class number 2.
%H A094619 T. D. Noe, <a href="b094619.txt">Table of n, a(n) for n=1..1000</a>
%H A094619 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               ClassNumber.html">ClassNumber</a>
%t A094619 Needs["NumberTheory`NumberTheoryFunctions`"] (*then*) Flatten[Position[ClassNumber/
               @Range[561], 2, {1}]]
%Y A094619 Cf. A003656, A094612, A094613, A094614.
%Y A094619 Sequence in context: A116309 A126816 A035120 this_sequence A052475 A060672 
               A134216
%Y A094619 Adjacent sequences: A094616 A094617 A094618 this_sequence A094620 A094621 
               A094622
%K A094619 nonn
%O A094619 1,1
%A A094619 Eric Weisstein (eric(AT)weisstein.com), May 14, 2004