A028925 - OEIS

%I #5 May 05 2016 23:28:57

%S 0,1,3,6,12,20,36,63,120,136

%N Maximal number of pairs of minimal vectors in an n-dimensional lattice.

%D J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 15.

%Y A001116 / 2.

%K nonn,hard,more

%O 0,3

%A _N. J. A. Sloane_.