A333109 - OEIS

%I #9 May 14 2020 15:51:05

%S 57,1145,8417,29121,80345,167105,333297,570969,939113,1441153,2153937,

%T 3029913,4262929,5741473,7606745,9876585,12690553,15921777,19922289,

%U 24430633,29834073,35990065,43151521,51068689

%N The number of vertices on an octagon 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 A333075 for images of the octagons.

%Y Cf. A333075 (regions), A333076 (n-gons), A333110 (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(7)-a(24) from _Lars Blomberg_, May 14 2020