that doesn't work becasue the numbers while going up as I wished, they
repeat all over the place (see exampel), and it looks to be about 15
cells
1
5
9
13
2
6
10
14
3
7
11
15
4
8
12
16
5
9
13
17
6
10
14
18
7
11
15
19
8
12
16
20
9
13
17
21
10
14
18