24 ≤ C(39,9,2) ≤ 26
Created by: LJCR
Method of Construction: Multiple of (13,3,2) covering
Lower Bound: Horsley, Theorem 1, r=5, d=2
1 2 8 14 15 21 27 28 34
1 3 12 14 16 25 27 29 38
1 4 9 14 17 22 27 30 35
1 5 6 14 18 19 27 31 32
1 7 10 14 20 23 27 33 36
1 11 13 14 24 26 27 37 39
2 3 7 15 16 20 28 29 33
2 4 13 15 17 26 28 30 39
2 5 12 15 18 25 28 31 38
2 6 9 15 19 22 28 32 35
2 10 11 15 23 24 28 36 37
3 4 11 16 17 24 29 30 37
3 5 13 16 18 26 29 31 39
3 6 10 16 19 23 29 32 36
3 8 9 16 21 22 29 34 35
4 5 7 17 18 20 30 31 33
4 6 8 17 19 21 30 32 34
4 10 12 17 23 25 30 36 38
5 8 11 18 21 24 31 34 37
5 9 10 18 22 23 31 35 36
6 7 13 19 20 26 32 33 39
6 11 12 19 24 25 32 37 38
7 8 12 20 21 25 33 34 38
7 9 11 20 22 24 33 35 37
8 10 13 21 23 26 34 36 39
9 12 13 22 25 26 35 38 39