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 A338002 #11 Apr 09 2021 01:02:33 %S A338002 56,816,6064,18152,52088,100608,208168,336840,579136,846560,1310960, %T A338002 1784888 %N A338002 The number of regions inside 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 A338002 The star consists of a central square surrounded by four equilateral triangles. See the linked images. %H A338002 Scott R. Shannon, <a href="/A338002/a338002.png">Image of the star with edge-count coloring for n=1</a>. %H A338002 Scott R. Shannon, <a href="/A338002/a338002_1.png">Image of the star with edge-count coloring for n=2</a>. %H A338002 Scott R. Shannon, <a href="/A338002/a338002_2.png">Image of the star with edge-count coloring for n=3</a>. %H A338002 Scott R. Shannon, <a href="/A338002/a338002_3.png">Image of the star with edge-count coloring for n=4</a>. %H A338002 Scott R. Shannon, <a href="/A338002/a338002_4.png">Image of the star with edge-count coloring for n=5</a>. %Y A338002 Cf. A338003 (number of vertices), A331906, A331908, A007678, A092867, A331452. %K A338002 nonn,more %O A338002 1,1 %A A338002 _Scott R. Shannon_ and _N. J. A. Sloane_, Oct 06 2020 %E A338002 a(8)-a(12) from _Lars Blomberg_, Apr 08 2021