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%I #10 Nov 04 2013 12:37:04
%S 1,1,1,1,3,76
%N Number of C-types (or contiguity types) of n-dimensional lattices.
%D Ryskov, S. S., C-types of n-dimensional parallelohedra, Dokl. Akad. Nauk SSSR 212 (1973), 46-49.
%D Ryskov, S. S. and Baranovskii, E. P., C-types of n-dimensional lattices and 5-dimensional primitive parallelohedra (with application to the theory of coverings), Trudy Mat. Inst. Steklov 137 (1976). English translation: Proc. Steklov Inst. Math. 1978, no. 4, 140 pp.
%Y Cf. A071880, A071881, A071882.
%K nonn,hard,nice
%O 0,5
%A _N. J. A. Sloane_, following a suggestion of _J. H. Conway_, Dec 26, 2003
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