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

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