%I A003840
%S A003840 2,129600,50759843097600,129182006871144805294080000,
%T A003840 2154683673871373733440812330742751559680000
%N A003840 Order of (usually) simple Chevalley group D_n (9).
%D A003840 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 A003840 H. S. M. Coxeter and W. O. J. Moser, Generators and Relations for Discrete 
               Groups, 4th ed., Springer-Verlag, NY, reprinted 1984, p. 131.
%Y A003840 Sequence in context: A071067 A060069 A114950 this_sequence A122540 A167518 
               A006935
%Y A003840 Adjacent sequences: A003837 A003838 A003839 this_sequence A003841 A003842 
               A003843
%K A003840 nonn,easy
%O A003840 1,1
%A A003840 N. J. A. Sloane (njas(AT)research.att.com).