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 A003134 #15 Jun 14 2024 22:31:08
%S A003134 51840,2903040,696729600
%N A003134 Orders of Weyl groups of type E_n.
%D A003134 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].
%D A003134 J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 120.
%D A003134 H. S. M. Coxeter and W. O. J. Moser, Generators and Relations for Discrete Groups, 4th ed., Springer-Verlag, NY, reprinted 1984.
%H A003134 Wikipedia, <a href="https://en.m.wikipedia.org/wiki/Exceptional_Lie_algebra">Exceptional Lie algebra</a>
%o A003134 (Magma) [ #CoxeterGroup(Sprintf("E%o",n)) : n in [6..8]]; // Sergei Haller (sergei(AT)sergei-haller.de), Dec 21 2006
%Y A003134 Cf. A001217, A113907.
%K A003134 nonn,fini,full,bref
%O A003134 6,1
%A A003134 _N. J. A. Sloane_