%I #16 May 18 2020 05:15:57

%S 390,7800,48870,164470,430840,900890,1735800,2982660,4849740,7438490,

%T 11017860,15596420,21713060,29254830,38714410,50238450,64311090,

%U 80839300,100786890,123786030,150835530

%N The number of edges on a decagon formed by the straight line segments mutually connecting all vertices and all points that divide the sides into n equal parts.

%C See the links in A333139 for images of the decagons.

%Y Cf. A333139 (regions), A332417 (n-gons), A332418 (vertices), A330845, A274586, A332600, A331765.

%K nonn,more

%O 1,1

%A _Scott R. Shannon_ and _N. J. A. Sloane_, Mar 09 2020

%E a(6)-a(21) from _Lars Blomberg_, May 18 2020