A008870 Order of simple Chevalley group E_7 (q), q = prime power.

7997476042075799759100487262680802918400, 1271375236818136742240479751139021644554379203770766254617395200

Offset

1,1

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

Table of n, a(n) for n=1..2.

Maple

q^63*(q^2-1)*(q^6-1)*(q^8-1)*(q^10-1)*(q^12-1)*(q^14-1)*(q^18-1)/gcd(2, q-1);

Mathematica

Table[q^63*(q^2-1)*(q^6-1)*(q^8-1)*(q^10-1)*(q^12-1)*(q^14-1)*(q^18-1)/GCD[2, q-1], {q, Select[Range[3], PrimePowerQ]}] (* Jean-François Alcover, Aug 24 2022 *)

Crossrefs

Sequence in context: A095472 A105300 A292992 * A008869 A095474 A003944

Adjacent sequences: A008867 A008868 A008869 * A008871 A008872 A008873

Keyword

nonn,easy,bref

Author

N. J. A. Sloane.

Status

approved