A001308 - OEIS

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A001308

Order of Chevalley group D_n (2).

1, 36, 20160, 174182400, 23499295948800, 50027557148216524800, 1691555775522928280469504000, 911666827031785075278550369566720000, 7846393898179181843651374899795632943267840000 (list; graph; refs; listen; history; 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: A159423 A196885 A203329 * A067584 A146521 A159431` `Adjacent sequences: A001305 A001306 A001307 * A001309 A001310 A001311`
	KEYWORD	`nonn,easy`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`

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Last modified February 14 19:37 EST 2012. Contains 205663 sequences.