N= 25  f= 18.136667
1   1
2   0
3   1
4   1
5   1
6   0
7   0
8   1
9   0
10   0
11   0
12   0
13   0
14   0
15   1
16   0
17   1
18   1
19   0
20   1
21   1
22   0
23   1
24   1
25   0