N= 25  f= 17.477778
1   0
2   0
3   1
4   0
5   1
6   0
7   0
8   1
9   1
10   0
11   0
12   0
13   0
14   1
15   0
16   1
17   1
18   0
19   0
20   0
21   1
22   0
23   0
24   0
25   1