N= 25  f= 14.181667
1   0
2   1
3   0
4   0
5   0
6   0
7   0
8   0
9   0
10   0
11   0
12   1
13   1
14   0
15   0
16   0
17   0
18   1
19   1
20   0
21   1
22   0
23   0
24   0
25   0