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A071136 Number of reduced positive-definite ternary forms of determinant -n. 2

%I

%S 1,1,2,2,2,2,3,4,4,3,3,6,4,3,6,7,4,6,5,8,7,4,5,10,6,5,9,9,5,7,7,12,9,

%T 6,9,14,7,6,10,14,7,9,8,13,15,6,9,20,9,10,11,13,8,11,13,16,12,8,10,22,

%U 10,8,19,17,12,12,11,17,14,12,11,28,12,9,19,18,14,12,12,28,16

%N Number of reduced positive-definite ternary forms of determinant -n.

%H G. Eisenstein, <a href="http://gdz.sub.uni-goettingen.de/dms/load/img/?PPN=PPN243919689_0041&amp;DMDID=DMDLOG_0018">Tabelle der reducirten positiven ternären quadratischen Formen...</a>, Crelle 41 (1851), 141-190 and 227-242; Ges. Werke II, 637-702.

%H A. Schiemann, <a href="http://www.math.rwth-aachen.de/~Gabriele.Nebe/LATTICES/index.html#cryst">Brandt-Intrau tables recomputed</a>

%Y Cf. A006376, A006377.

%K nonn,nice

%O 1,3

%A _N. J. A. Sloane_, Jun 20 2002

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Last modified August 19 18:51 EDT 2019. Contains 326133 sequences. (Running on oeis4.)