A127406 - cp's OEIS frontend

A127406 Number of points in a 2-dimensional honeycomb net covered by a circular disk of diameter n if the center of the disk is chosen to maximize the number of net points covered by the disk.

n	a(n)
1	2
2	6
3	7
4	13
5	17
6	25
7	34
8	42
9	54
10	64
11	78
12	90
13	107
14	126
15	140
16	163
17	178
18	204
19	222
20	246

[2, 6, 7, 13, 17, 25, 34, 42, 54, 64, 78, 90, 107, 126, 140, 163, 178, 204, 222, 246]