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 A063723 #21 Nov 05 2020 22:01:56 %S A063723 4,8,6,20,12 %N A063723 Number of vertices in the Platonic solids (in the order tetrahedron, cube, octahedron, dodecahedron, icosahedron). %C A063723 The preferred order for these five numbers is 4, 6, 8, 12, 20 (tetrahedron, octahedron, cube, icosahedron, dodecahedron), as in A053016. - _N. J. A. Sloane_, Nov 05 2020 %C A063723 Also number of faces of Platonic solids ordered by increasing ratios of volumes to their respective circumscribed spheres. See cross-references for actual ratios. - _Rick L. Shepherd_, Oct 04 2009 %C A063723 Also the expected lengths of nontrivial random walks along the edges of a Platonic solid from one vertex back to itself. - _Jens Voß_, Jan 02 2014 %F A063723 a(n) = A063722(n) - A053016(n) + 2. %e A063723 a(2) = 8 since a cube has eight vertices. %Y A063723 Cf. A053012, A053016, A060296, A060852. %Y A063723 Cf. A165922 (tetrahedron), A049541 (octahedron), A165952 (cube), A165954 (icosahedron), A165953 (dodecahedron). - _Rick L. Shepherd_, Oct 04 2009 %Y A063723 Cf. A234974. - _Jens Voß_, Jan 02 2014 %K A063723 easy,fini,full,nonn %O A063723 1,1 %A A063723 _Henry Bottomley_, Aug 14 2001