9 ≤ C(26,15,3) ≤ 11
Method of Construction: dynamic programming covering
Lower Bound: Schonheim
1 2 3 5 6 7 9 10 11 13 14 15 17 18 19
1 2 4 5 6 8 9 10 12 13 14 16 17 18 20
1 3 4 5 7 8 9 11 12 13 15 16 17 19 20
2 3 4 6 7 8 10 11 12 14 15 16 18 19 20
2 4 5 13 14 15 16 18 19 21 22 23 24 25 26
1 3 5 8 10 12 14 18 20 21 22 23 24 25 26
2 4 6 8 9 10 12 16 20 21 22 23 24 25 26
7 8 10 11 12 13 15 17 19 21 22 23 24 25 26
5 6 7 9 11 14 17 18 20 21 22 23 24 25 26
1 2 3 4 7 11 12 16 17 21 22 23 24 25 26
1 3 6 8 9 13 15 19 20 21 22 23 24 25 26