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 A003800 #16 Jun 14 2024 22:31:08
%S A003800 168,5616,60480,372000,5630688,16482816,42456960,212427600,810534816,
%T A003800 4277145600,6950204928,16934047920,78156525216,152334000000,
%U A003800 282027786768,499631102880,851974934400,1098404364288
%N A003800 Order of universal Chevalley group A_2 (q), q = prime power.
%D A003800 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 A003800 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 A003800 a(n) = A(A000961(n+1),2) where A(q,n) is defined in A003787. - _Sean A. Irvine_, Sep 18 2015
%t A003800 f[m_, n_] := m^(n (n + 1)/2) Product[m^k - 1, {k, 2, n + 1}]; f[#, 2] & /@ Select[Range[2, 36], PrimePowerQ] (* _Michael De Vlieger_, Sep 18 2015 *)
%K A003800 nonn,easy
%O A003800 1,1
%A A003800 _N. J. A. Sloane_