X/Y -3 -2 -1 0 1 2 3
-3 18 13 10 9 10 13 18
-2 13 8 5 4 5 8 13
-1 10 5 2 1 2 5 10
0 9 4 1 0 1 4 9
1 10 5 2 1 2 5 10
2 13 8 5 4 5 8 13
18
16-18
16
14-16
14
12-14
12
10-12
10 8 6 4 2 0
8-10 Series7 Series5 Series3 1
2
3
4
5
6
Series1 7
6-8 4-6 2-4 0-2
3 18 13 10 9 10 13 18