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A001308 Order of Chevalley group D_n (2). 3
1, 36, 20160, 174182400, 23499295948800, 50027557148216524800, 1691555775522928280469504000, 911666827031785075278550369566720000, 7846393898179181843651374899795632943267840000 (list; graph; refs; listen; history; text; internal format)
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, 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.

LINKS

T. D. Noe, Table of n, a(n) for n=1..20

FORMULA

2^(n*(n-1)) * (2^n - 1) * product( 2^(2*i)-1, i=1..n-1).

MAPLE

for m from 0 to 25 do N:=2^(m*(m-1))*mul( 4^i-1, i=1..m-1)*(2^m-1); lprint(N); od:

CROSSREFS

Cf. A003923.

Sequence in context: A271337 A203329 A271338 * A067584 A308423 A146521

Adjacent sequences:  A001305 A001306 A001307 * A001309 A001310 A001311

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified September 30 02:03 EDT 2020. Contains 337432 sequences. (Running on oeis4.)