A028926 - OEIS

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A028926

Number of pairs of minimal vectors in n-dimensional lattice Kappa_n.

%I #4 Mar 30 2012 16:47:10

%S 0,1,3,6,12,20,36,46,66,90,138,216,378,459,616,873,1645,2133

%N Number of pairs of minimal vectors in n-dimensional lattice Kappa_n.

%D J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 161.

%Y A028923 / 2.

%K nonn

%O 0,3

%A _N. J. A. Sloane_.