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A003837
Order of (usually) simple Chevalley group D_n (3).
9
1, 144, 6065280, 4952179814400, 1289512799941305139200, 6762844700608770238252960972800, 11470635634813395742481912276441576767488000, 393736985584514548835738283681336315795223487793070080000
OFFSET
1,2
REFERENCES
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.
H. S. M. Coxeter and W. O. J. Moser, Generators and Relations for Discrete Groups, 4th ed., Springer-Verlag, NY, reprinted 1984, p. 131.
FORMULA
a(n) = d(3,n) where d(q,n) = D(q,n) / gcd(4, q^n-1) and D(q,n) as defined in A003830. - Sean A. Irvine, Sep 17 2015
CROSSREFS
Sequence in context: A318197 A362214 A193346 * A013863 A371624 A173225
KEYWORD
nonn,easy
EXTENSIONS
Fixed offset, one more term, and formula from Sean A. Irvine, Sep 17 2015
STATUS
approved