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Number of n-dimensional determinant 4 lattices.
(Formerly M0499)
0

%I M0499 #11 Oct 26 2023 22:46:29

%S 0,1,1,2,3,4,5,6,7,10,13,16,22

%N Number of n-dimensional determinant 4 lattices.

%D J. H. Conway and N. J. A. Sloane, Low-dimensional lattices I: quadratic forms of small determinant, Proc. Royal Soc. London, A 418 (1988), 17-41.

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

%K nonn

%O 0,4

%A _N. J. A. Sloane_