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 A003797 #14 Jun 14 2024 22:31:08
%S A003797 1,168,1876896,2317591180800,187035198320488089600,
%T A003797 61637759336805268655956377600,
%U A003797 35832085525362833262818017603275320524800,85057500275967538647136529625446531799449748111360000
%N A003797 Order of simple Chevalley group A_n (7).
%D A003797 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 A003797 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 A003797 a(n) = a(7,n) where a(q,n) is defined in A003793. - _Sean A. Irvine_, Sep 18 2015
%t A003797 f[m_, n_] := Block[{g, x, y}, g[x_, y_] := x^(y (y + 1)/2) Product[x^k - 1, {k, 2, y + 1}]; g[m, n]/GCD[n + 1, m - 1]]; f[7, #] & /@ Range[0, 7] (* _Michael De Vlieger_, Sep 18 2015 *)
%K A003797 nonn,easy
%O A003797 0,2
%A A003797 _N. J. A. Sloane_
%E A003797 a(7) from _Sean A. Irvine_, Sep 18 2015