A333113 - OEIS

%I #9 May 14 2020 04:24:21

%S 42,708,5369,17417,47796,99261,194278,331955,546805,833946,1245314,

%T 1762265,2461837,3311680,4402405,5700598,7322231,9200878,11494161,

%U 14108123,17224438,20752264,24894009,29506128,34854099,40780391,47552050

%N 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 See the links in A329713 for images of the heptagons.

%Y Cf. A329713 (regions), A329714 (n-gons), A333112 (edges), A330846, A092866, A332599, A007569.

%K nonn,more

%O 1,1

%A _Scott R. Shannon_ and _N. J. A. Sloane_, Mar 07 2020

%E a(8)-a(27) from _Lars Blomberg_, May 13 2020