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Number of genera of forms with |determinant| = n.
(Formerly M0333)
0

%I M0333 #18 May 18 2021 23:41:58

%S 2,2,4,9,4,4,4,10,8,4,4

%N Number of genera of forms with |determinant| = n.

%D J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 387.

%D N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

%K nonn,nice,more

%O 1,1

%A _N. J. A. Sloane_