A288179 - cp's OEIS frontend

A288179 Maximum number of vertices of any convex polygon formed in the middle square of the boundary by drawing the line segments connecting any two lattice points in an (2k+1) X (2k+1) lattice polygon.

n	a(n)
1	4
2	6
3	7
4	6
5	7
6	6
7	6
8	7
9	7
10	8
11	8
12	7
13	7
14	8
15	8
16	8
17	8
18	8
19	8

[4, 6, 7, 6, 7, 6, 6, 7, 7, 8, 8, 7, 7, 8, 8, 8, 8, 8, 8]