A003840 - OEIS

%I #11 Jun 14 2024 22:31:08

%S 2,129600,50759843097600,129182006871144805294080000,

%T 2154683673871373733440812330742751559680000,

%U 235766858527753399707968381023024646011879419539171573760000000

%N Order of (usually) simple Chevalley group D_n (9).

%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 [for best online version see https://oeis.org/wiki/Welcome#Links_to_Other_Sites], p. xvi.

%D H. S. M. Coxeter and W. O. J. Moser, Generators and Relations for Discrete Groups, 4th ed., Springer-Verlag, NY, reprinted 1984, p. 131.

%F a(n) = d(9,n) where d(q, n) is defined in A003837. - _Sean A. Irvine_, Sep 17 2015

%K nonn,easy

%O 1,1

%A _N. J. A. Sloane_

%E a(6) from _Sean A. Irvine_, Sep 17 2015