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 A333118 #8 May 06 2020 04:58:53 %S A333118 65,1965,14100,49760,130235,268900,522770,911425,1474680,2276820, %T A333118 3354695,4785575,6665240,8973795,11903415,15446945,19825715,24850460, %U A333118 31025390,38221130,46557865,56092005,67123385,79765335,94249750,110346520,128289075,148525930,171374335,196206590 %N A333118 The number of edges 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 A333118 See the links in A331906 for images of the pentagrams. %Y A333118 Cf. A331906 (regions), A331907 (n-gons), A333117 (vertices), A274586, A332600, A331765. %K A333118 nonn %O A333118 1,1 %A A333118 _Scott R. Shannon_ and _N. J. A. Sloane_, Mar 08 2020 %E A333118 a(7)-a(30) from _Lars Blomberg_, May 06 2020