14 ≤ C(20,13,4) ≤ 15
Created by: Alessandro Jurcovich
Method of Construction: ex 16
Lower Bound: Schonheim
1 2 3 4 5 6 10 15 16 17 18 19 20
1 2 3 4 7 8 9 11 12 13 14 16 18
1 2 3 5 6 7 8 10 12 15 17 19 20
1 2 3 5 6 9 11 12 13 14 15 17 20
1 2 3 5 9 10 11 12 13 14 15 19 20
1 4 5 6 8 10 12 15 16 17 18 19 20
1 4 5 7 9 11 13 14 15 16 17 18 20
1 4 6 7 9 10 11 13 14 16 18 19 20
1 5 6 8 9 10 11 13 14 15 17 19 20
2 3 4 5 7 8 9 12 14 15 16 18 20
2 3 4 5 7 8 11 12 13 15 16 18 20
2 3 4 6 7 8 10 12 13 16 17 18 19
2 3 4 6 8 9 10 11 12 14 17 18 19
2 3 6 7 8 9 10 11 12 14 16 17 19
4 5 6 7 9 10 11 13 14 15 16 18 19