A003936 Order of universal Chevalley group B_7(q), q = prime power.

27930968965434591767112450048000, 109777561863482259035023554842176139436811616256000, 1536234346098532793158147848149455029037710018156586598400000000, 23626386639924457166562360847447514533996582031250000000000000000000000000

Offset: 1

Author

N. J. A. Sloane

Keywords

• nonn
• easy

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

• Index entries for sequences related to groups.

Crossrefs

Cf. A000961, A003920, A003931, A003932, A003933, A003934, A003935, A003937.

Programs

Mathematica

B[q_, n_] := q^(n^2) * Product[q^(2*k) - 1, {k, 1, n}]; Table[B[q, 7], {q, Select[Range[10], PrimePowerQ]}] (* Amiram Eldar, Jun 24 2025 *)

Formula

a(n) = B(A000961(n + 1), 7) where B(q,n) is defined in A003920. - Sean A. Irvine, Sep 22 2015

Extensions

a(3)-a(4) from Sean A. Irvine, Sep 22 2015