%I
%S 3,3600,987033600,67010895544320000,1154606796534757164318720000,
%T 5081732431326820541485324550799360000000,
%U 5722569627753465177061732369386833143098255605760000000
%N Order of universal Chevalley group D_n (4).
%D J. H. Conway, R. T. Curtis, S. P. Norton, R. A. Parker and R. A. Wilson, ATLAS of Finite Groups. Oxford Univ. Press, 1985, p. xvi.
%D H. S. M. Coxeter and W. O. J. Moser, Generators and Relations for Discrete Groups, 4th ed., SpringerVerlag, NY, reprinted 1984, p. 131.
%F a(n) = D(4,n) where D(q,n) is defined in A003830.  _Sean A. Irvine_, Sep 17 2015
%K nonn,easy
%O 1,1
%A _N. J. A. Sloane_.
