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 A063925 #21 Jan 12 2023 18:43:02 %S A063925 10,24,32,96,720,1200 %N A063925 Number of 2-dimensional faces in the regular 4-dimensional polytopes. %C A063925 Sorted by number of 2-dimensional faces. %C A063925 Also the number of edges in the regular 4-dimensional polytopes [_Douglas Boffey_, Aug 12 2012] %D A063925 H. S. M. Coxeter, Regular Polytopes, 3rd ed., Dover, NY, 1973. %H A063925 Paul Bourke, <a href="http://paulbourke.net/geometry/hyperspace/">Regular polytopes (Platonic solids) in 4D</a> %H A063925 <a href="/index/Pol#polytopes">Index entries for sequences related to polytopes</a> %F A063925 a(n) = A063924(n)+A063926(n)-A063927(n). %e A063925 a(2) = 24 since a 4D hypercube contains twenty-four faces. %Y A063925 Cf. A053016, A063722, A063723. %K A063925 fini,full,nonn %O A063925 1,1 %A A063925 _Henry Bottomley_, Aug 15 2001