11 ≤ C(22,15,4) ≤ 12
Method of Construction: dynamic programming covering
Lower Bound: Schonheim
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
1 2 3 4 5 6 7 8 9 10 11 12 13 16 17
1 2 3 4 5 6 7 8 9 10 11 12 13 18 19
1 2 3 4 5 6 7 8 9 10 11 12 13 20 21
1 2 3 4 5 6 7 8 9 10 11 12 13 17 22
1 2 3 4 5 6 14 15 16 17 18 19 20 21 22
1 7 8 9 10 11 14 15 16 17 18 19 20 21 22
2 3 7 8 12 13 14 15 16 17 18 19 20 21 22
4 5 9 10 12 13 14 15 16 17 18 19 20 21 22
2 3 6 9 10 11 14 15 16 17 18 19 20 21 22
4 5 6 7 8 11 14 15 16 17 18 19 20 21 22
1 2 6 11 12 13 14 15 16 17 18 19 20 21 22