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 A329770 #20 Jan 08 2020 19:16:23 %S A329770 1,3,15,12,1 %N A329770 Coordination sequence for trivalent vertex in 1-skeleton of triakis icosahedron. %H A329770 Tom Karzes, <a href="/A298808/a298808.html">Polyhedron Coordination Sequences</a> %H A329770 N. J. A. Sloane, <a href="/A329770/a329770_1.pdf">Triakis icosahedron showing distances from a trivalent vertex</a>. The base vertex is labeled 0, and the vertices at distances 1, 2, and 4 are marked, as are some vertices at distance 3. Unlabeled vertices should also be labeled 3. [This image was constructed by adding labels to an image on the Wikipedia page.] %H A329770 Wikipedia, <a href="https://en.wikipedia.org/wiki/Triakis_icosahedron">Triakis icosahedron</a> %Y A329770 See A329772 for a 10-valent vertex. %K A329770 nonn,fini,full %O A329770 0,2 %A A329770 _N. J. A. Sloane_, Nov 25 2019