%I #10 Jun 14 2024 22:31:09
%S 214841575522005575270400,14515406695082926420056516790429286400,
%T 85528710781342640103833619055142765466746880000,
%U 3175144122737732284276405334472656250000000000000000000
%N Order of universal Chevalley group E_6 (q), q = prime power.
%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.
%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.
%p q^36*(q^2-1)*(q^5-1)*(q^6-1)*(q^8-1)*(q^9-1)*(q^12-1);
%Y Cf. A178780.
%K nonn
%O 1,1
%A _N. J. A. Sloane_.