A003841 - OEIS

A003841

Order of universal Chevalley group D_2(q), q = prime power.

36, 576, 3600, 14400, 112896, 254016, 518400, 1742400, 4769856, 16646400, 23970816, 46785600, 147476736, 243360000, 386358336, 593409600, 885657600, 1071645696, 2561979456, 4744454400, 6314527296

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OFFSET

1,1

COMMENTS

Numbers given so far divided by 36 (except the first) are all members of A014796. - Ralf Stephan, Feb 07 2004

Is a(n) = A007531( A000961(n)+1 )^2? - Ralf Stephan, Feb 08 2004

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.

LINKS

Table of n, a(n) for n=1..21.

FORMULA

a(n) = D(A000961(n+1),2) where D(q,n) is defined in A003830. - Sean A. Irvine, Sep 17 2015

CROSSREFS

Sequence in context: A218311 A183356 A099764 * A226284 A223271 A151597

Adjacent sequences: A003838 A003839 A003840 * A003842 A003843 A003844

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane

STATUS

approved