This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A003806 #17 Jun 14 2024 22:31:08
%S A003806 699612310033197642547200,124190524600592082795473760093457612800,
%T A003806 1341733356588640095264385107865053233298800640000,
%U A003806 78616578542037111790447631835937500000000000000000000000,39573939034651534226739680064959446854442420750012276098670264320000
%N A003806 Order of universal Chevalley group A_8 (q), q = prime power.
%D A003806 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.
%D A003806 H. S. M. Coxeter and W. O. J. Moser, Generators and Relations for Discrete Groups, 4th ed., Springer-Verlag, NY, reprinted 1984, p. 131.
%F A003806 a(n) = A(A000961(n+1),8) where A(q,n) is defined in A003787. - _Sean A. Irvine_, Sep 18 2015
%t A003806 f[m_, n_] := m^(n (n + 1)/2) Product[m^k - 1, {k, 2, n + 1}]; f[#, 8] & /@ Select[Range[2, 7], PrimePowerQ] (* _Michael De Vlieger_, Sep 18 2015 *)
%K A003806 nonn,easy
%O A003806 1,1
%A A003806 _N. J. A. Sloane_
%E A003806 a(5) from _Sean A. Irvine_, Sep 18 2015