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%I M0207 #19 Mar 19 2017 19:49:47
%S 1,1,1,1,1,2,2,2,1,2,3,2,2,2,3,3,2,3,4,2,1,4,5,4,2,2,4,4,3,4,5,4,1,4,
%T 7,3,3,4,5,6,3,4,6,2,2,6,8,6,3,3,5,6,3,6,8,4,2,6,10,4,2,6,5,7,5,4,8,4,
%U 3,8,10,8,3,2,7,6,4,8,10,6,1,8
%N Number of reduced binary quadratic forms of discriminant -n.
%D H. Davenport, The Higher Arithmetic. Cambridge Univ. Press, 5th edition, 1982, p. 144.
%D N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
%H Rick L. Shepherd, <a href="http://libres.uncg.edu/ir/uncg/f/Shepherd_uncg_0154M_11099.pdf">Binary quadratic forms and genus theory</a>, Master of Arts Thesis, University of North Carolina at Greensboro, 2013.
%Y Cf. A006374.
%K nonn
%O 3,6
%A _N. J. A. Sloane_
%E More terms from _Sean A. Irvine_, Mar 19 2017
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