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Number of n-dimensional determinant 2 lattices.
(Formerly M0262)
0

%I M0262 #11 Oct 26 2023 22:45:45

%S 0,1,1,1,1,1,1,2,2,3,3,4,4,6,7,11,14,24,30

%N Number of n-dimensional determinant 2 lattices.

%D J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 400.

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

%K nonn

%O 0,8

%A _N. J. A. Sloane_