A335194 a(n) is the number of vertices inside an n-gon formed by the straight line segments connecting vertex k to vertex 3k mod n.

3, 4, 6, 8, 10, 10, 14, 20, 25, 18, 33, 40, 39, 30, 58, 58, 70, 56, 78, 94, 105, 72, 121, 134, 131, 120, 166, 164, 186, 142, 198, 224, 241, 198, 265, 284, 279, 234, 330, 310, 358, 324, 374, 410, 433, 340, 465, 490, 483, 460, 550, 544, 586, 498, 606, 652, 681

Offset: 3

Author

Lars Blomberg, May 26 2020

Keywords

• nonn

Comments

See A335192 for illustrations.

Links

• Lars Blomberg, Table of n, a(n) for n = 3..300

Crossrefs

Cf. A335192 (regions), A335193 (edges), A335195 (n-gons).