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 A003933 #18 Jun 24 2025 05:48:52
%S A003933 47377612800,131569513308979200,4408780839651901440000,
%T A003933 13946558535000000000000000,2596509480922336727312302080000,
%U A003933 319368723699461283992462111539200,22246837484597339860644476682240000
%N A003933 Order of universal Chevalley group B_4(q), q = prime power.
%D A003933 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 A003933 H. S. M. Coxeter and W. O. J. Moser, Generators and Relations for Discrete Groups, 4th ed., Springer-Verlag, NY, reprinted 1984, p. 131.
%H A003933 <a href="/index/Gre#groups">Index entries for sequences related to groups</a>.
%F A003933 a(n) = B(A000961(n + 1), 4) where B(q,n) is defined in A003920. - _Sean A. Irvine_, Sep 22 2015
%t A003933 B[q_, n_] := q^(n^2) * Product[q^(2*k) - 1, {k, 1, n}]; Table[B[q, 4], {q, Select[Range[10], PrimePowerQ]}] (* _Amiram Eldar_, Jun 24 2025 *)
%Y A003933 Cf. A000961, A003920, A003931, A003932, A003934, A003935, A003936, A003937.
%K A003933 nonn,easy
%O A003933 1,1
%A A003933 _N. J. A. Sloane_
%E A003933 a(7) from _Sean A. Irvine_, Sep 22 2015