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 A063927 #18 Jan 15 2023 02:06:50 %S A063927 5,16,8,24,600,120 %N A063927 Number of vertices in the regular 4-dimensional polytopes. %C A063927 Sorted by number of 3-dimensional faces. %D A063927 H. S. M. Coxeter, Regular Polytopes, 3rd ed., Dover, NY, 1973. %H A063927 Paul Bourke, <a href="http://paulbourke.net/geometry/hyperspace/">Regular polytopes (Platonic solids) in 4D</a> %H A063927 <a href="/index/Pol#polytopes">Index entries for sequences related to polytopes</a> %F A063927 a(n) = A063926(n) - A063925(n) + A063924(n). %e A063927 a(2) = 16 since a 4D hypercube contains sixteen vertices. %Y A063927 Cf. A060296, A053016, A063722, A063723. %K A063927 fini,full,nonn %O A063927 1,1 %A A063927 _Henry Bottomley_, Aug 15 2001