A333109 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.

57, 1145, 8417, 29121, 80345, 167105, 333297, 570969, 939113, 1441153, 2153937, 3029913, 4262929, 5741473, 7606745, 9876585, 12690553, 15921777, 19922289, 24430633, 29834073, 35990065, 43151521, 51068689

Offset: 1

Author

Scott R. Shannon and N. J. A. Sloane, Mar 07 2020

Keywords

• nonn
• more

Comments

See the links in A333075 for images of the octagons.

Crossrefs

Cf. A333075 (regions), A333076 (n-gons), A333110 (edges), A330846, A092866, A332599, A007569.

Extensions

a(7)-a(24) from Lars Blomberg, May 14 2020