%I M4832 #13 Nov 23 2015 00:27:00
%S 1,12,30,427
%N Number of crystallographic orbits in n dimensions.
%D P. Engel, "Geometric crystallography," in P. M. Gruber and J. M. Wills, editors, Handbook of Convex Geometry. North-Holland, Amsterdam, Vol. B, pp. 989-1041.
%D N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
%K nonn,hard,nice
%O 0,2
%A _N. J. A. Sloane_