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_
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_
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a(n) = D(A000961(n+1),6) where D(q,n) is defined in A003830. - Sean A. Irvine, Sep 17 2015
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Order of universal Chevalley group D_6 (q), q = prime power.
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2,1,1
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