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 A199807 #10 Feb 11 2020 07:42:04
%S A199807 40,120,128,192,384,600,960,960,960,1920,2880,3072,4800,4800,7680,
%T A199807 14400,14400,15360,23040,23040,36000,46080,72000,115200,115200,115200,
%U A199807 288000,4320000,576000,864000,921600,1728000,2764800,6912000,13824000
%N A199807 Sorted number of vertices of distinct solutions in the mix of 2 or 3 regular convex 4-polytopes.
%C A199807 Sorted 1st column of Table 2, p. 11, of Cunningham.
%H A199807 Gabe Cunningham, <a href="http://arxiv.org/abs/1111.1312">Mixing Convex Polytopes</a>, arXiv:1111.1312v1 [math.CO], Nov 5, 2011.
%e A199807 a(1) = 40 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 A199807 Cf. A063924, A199545, A199546, A199549, A199808-A199811.
%K A199807 nonn,fini,full
%O A199807 1,1
%A A199807 _Jonathan Vos Post_, Nov 10 2011