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 A338003 #14 Apr 09 2021 02:33:00 %S A338003 37,653,5517,17153,50349,97037,204329,330613,571021,835713,1298533, %T A338003 1764125 %N A338003 The number of vertices in a 4-pointed star formed by the straight line segments mutually connecting all vertices and all points that divide the sides into n equal parts. %C A338003 See A338002 for a definition of the star and images for the number of regions. %H A338003 Scott R. Shannon, <a href="/A338003/a338003.png">Image of the star showing the vertex counts for n=1</a>. %H A338003 Scott R. Shannon, <a href="/A338003/a338003_1.png">Image of the star showing the vertex counts for n=2</a>. %H A338003 Scott R. Shannon, <a href="/A338003/a338003_2.png">Image of the star showing the vertex counts for n=3</a>. %H A338003 Scott R. Shannon, <a href="/A338003/a338003_3.png">Image of the star showing the vertex counts for n=4</a>. %H A338003 Scott R. Shannon, <a href="/A338003/a338003_4.png">Image of the star showing the vertex counts for n=5</a>. %Y A338003 Cf. A338002 (number of regions), A092866, A332599, A007569, A333117, A333116. %K A338003 nonn,more %O A338003 1,1 %A A338003 _Scott R. Shannon_ and _N. J. A. Sloane_, Oct 06 2020 %E A338003 a(8)-a(12) from _Lars Blomberg_, Apr 08 2021