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 A333113 #9 May 14 2020 04:24:21 %S A333113 42,708,5369,17417,47796,99261,194278,331955,546805,833946,1245314, %T A333113 1762265,2461837,3311680,4402405,5700598,7322231,9200878,11494161, %U A333113 14108123,17224438,20752264,24894009,29506128,34854099,40780391,47552050 %N A333113 The number of vertices inside a heptagon formed by the straight line segments mutually connecting all vertices and all points that divide the sides into n equal parts. %C A333113 See the links in A329713 for images of the heptagons. %Y A333113 Cf. A329713 (regions), A329714 (n-gons), A333112 (edges), A330846, A092866, A332599, A007569. %K A333113 nonn,more %O A333113 1,1 %A A333113 _Scott R. Shannon_ and _N. J. A. Sloane_, Mar 07 2020 %E A333113 a(8)-a(27) from _Lars Blomberg_, May 13 2020