0  0
1  0
1  1
2  0
2  2
3  0
3  1
3  3
4  0
4  4
5  0
5  1
5  2
5  5
6  0
6  6
7  0
7  1
7  3
7  7
8  0
8  2
8  8
9  0
9  1
9  4
9  9
10  0
10  10
11  0
11  1
11  2
11  3
11  5
11  11
12  0
12  12
13  0
13  1
13  6
13  13
14  0
14  2
14  4
14  14
15  0
15  1
15  3
15  7
15  15
16  0
16  16
17  0
17  1
17  2
17  5
17  8
17  17
18  0
18  18
19  0
19  1
19  3
19  4
19  9
19  19
20  0
20  2
20  6
21  0
21  1
21  10
22  0
23  0
23  1
23  2
23  3
23  5
23  7
23  11
24  0
24  4
25  0
25  1
25  12
26  0
26  2
26  8
27  0
27  1
27  3
27  6
27  13
28  0
29  0
29  1
29  2
29  4
29  5
29  9
29  14