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 A063722 #8 Feb 16 2025 08:32:45 %S A063722 6,12,12,30,30 %N A063722 Number of edges in the Platonic solids (in the order tetrahedron, cube, octahedron, dodecahedron, icosahedron). %H A063722 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PlatonicSolid.html">Platonic Solid</a> %F A063722 a(n) = A053016(n)+A063723(n)-2. %e A063722 a(2) = 12 since a cube has twelve edges. %Y A063722 Cf. A053012, A060296, A060852. %K A063722 easy,fini,full,nonn %O A063722 1,1 %A A063722 _Henry Bottomley_, Aug 14 2001