20 ≤ C(20,9,3) ≤ 21
Created by: Felix Rodriguez Martin
Lower Bound: Schonheim
1 2 3 6 7 10 17 19 20
1 2 4 5 6 8 11 12 13
1 2 4 7 9 10 11 14 16
1 2 6 9 14 15 16 17 18
1 3 4 8 13 14 15 17 20
1 3 5 9 11 12 17 18 20
1 3 10 11 12 13 15 16 19
1 4 5 7 8 10 16 18 20
1 4 5 7 12 14 15 17 19
1 7 8 9 11 13 17 18 19
2 3 4 7 11 16 17 19 20
2 3 4 10 12 13 15 18 19
2 3 5 8 9 10 14 15 19
2 5 6 8 10 12 13 16 17
2 5 7 8 10 11 15 18 20
2 7 9 10 12 13 14 15 20
3 4 5 6 7 9 13 15 16
3 6 7 8 11 12 14 16 18
4 6 8 9 12 15 16 19 20
4 6 9 10 11 14 15 17 18
5 6 11 13 14 16 18 19 20