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 A333117 #8 May 06 2020 04:58:25 %S A333117 26,866,6771,24221,64306,132701,259761,453016,734131,1134081,1673056, %T A333117 2384606,3326391,4478286,5941196,7710796,9901136,12407581,15497721, %U A333117 19088991,23256266,28021386,33537586,39846196,47092241,55136771,64103776,74213991,85642556,98039461 %N A333117 The number of vertices inside a pentagram formed by the straight line segments mutually connecting all vertices and all points that divide the sides into n equal parts. %C A333117 See the links in A331906 for images of the pentagrams. %Y A333117 Cf. A331906 (regions), A331907 (n-gons), A333118 (edges), A092866, A332599, A007569. %K A333117 nonn %O A333117 1,1 %A A333117 _Scott R. Shannon_ and _N. J. A. Sloane_, Mar 08 2020 %E A333117 a(7)-a(30) from _Lars Blomberg_, May 06 2020