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