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%I #10 Dec 14 2019 21:34:02
%S 1,2,1,2,2,2,2,1,2,4,1,2,2,2,2,2,1,4,2,2,4,4,1,2,4,1,4,2,2,2,4,1,4,2,
%T 2,2,1,2,2,4,2,2,4,2,1,2,2,4,6,4,2,2,2,4,1,4,2,2,4,1
%N Class number of binary quadratic forms with radicand A005117(n).
%C The fundamental discriminant D and the radicand m (which is squarefree) are related via D=m if m=1 (mod 4) and D=4*m if m=2,3 (mod 4).
%D Hua Loo Keng, Introduction to Number Theory, Springer-Verlag, 1982, pp. 465-472.
%H S. R. Finch, <a href="http://www.people.fas.harvard.edu/~sfinch/">Class number theory</a>
%H Steven R. Finch, <a href="/A000924/a000924.pdf">Class number theory</a> [Cached copy, with permission of the author]
%H Jens Jonasson, <a href="http://www.mai.liu.se/~jejon/">Classes of integral binary quadratic forms</a>, Master's thesis (2001), Appendix B.
%Y Cf. A003646, A087048.
%K nonn
%O 2,2
%A _Steven Finch_, May 03 2005
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