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 A199811 #10 Feb 11 2020 07:43:06
%S A199811 23040,23040,69120,73728,221184,221184,864000,864000,2764800,2764800,
%T A199811 2764800,2764800,4423680,8294400,8294400,13271040,13271040,42467328,
%U A199811 103680000,165888000,165888000,165888000,165888000,497664000,497664000,530841600,530841600,1592524800,1592524800,1592524800,1592524800,6220800000,19906560000,19906560000,59719680000
%N A199811 Sorted orders of automorphism groups of distinct solutions in the mix of 2 or 3 regular convex 4-polytopes.
%C A199811 Sorted 5th column of Table 2, p. 11, of Cunningham.
%H A199811 Gabe Cunningham, <a href="http://arxiv.org/abs/1111.1312">Mixing Convex Polytopes</a>, arXiv:1111.1312v1 [math.CO], Nov 5, 2011
%e A199811 a(1) = 23040 because the mix of the pentatope {3,3,3} and the 16-cell hyperoctahedron {3,3,4} has 40 vertices, 480 edges, 1920 faces, 960 polyhedral facets, and an automorphism group of order 23040, and is itself polytopal (not every mix of polytope and polytope is a polytope).
%Y A199811 Cf. A063924, A199545, A199546, A199549, A199807-A199811.
%K A199811 nonn,fini,full
%O A199811 1,1
%A A199811 _Jonathan Vos Post_, Nov 10 2011