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

1,1

Comments

See the links in A333075 for images of the octagons.

Links

Table of n, a(n) for n=1..24.

Crossrefs

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

Sequence in context: A332947 A116181 A336734 * A208601 A000505 A332911

Adjacent sequences: A333106 A333107 A333108 * A333110 A333111 A333112

Keyword

nonn,more

Author

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

Extensions

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

Status

approved