C(26,3,2) = 113
Method of Construction: simple construction: combined (25,3,2) and (25,2,1)-coverings
Lower Bound: Schonheim
2 7 8
16 24 25
2 4 10
11 23 25
3 6 10
14 22 25
3 5 11
4 21 25
2 6 11
7 20 25
1 8 11
8 19 25
1 4 12
3 18 25
5 7 12
12 17 25
6 8 12
13 15 25
2 9 12
5 10 25
1 3 13
6 9 25
1 2 25
8 9 13
14 23 24
2 3 14
7 22 24
6 7 14
6 21 24
5 9 14
12 20 24
4 11 14
4 19 24
4 5 15
15 18 24
3 7 15
2 17 24
10 11 15
11 13 24
12 14 15
8 10 24
4 8 16
3 9 24
1 5 24
9 11 16
21 22 23
7 13 16
2 20 23
1 14 16
5 19 23
1 10 17
17 18 23
7 11 17
12 16 23
1 15 23
4 13 17
6 13 23
6 15 17
9 10 23
5 16 17
3 8 23
1 6 18
4 7 23
4 9 18
11 20 22
7 10 18
18 19 22
11 12 18
3 17 22
5 13 18
15 16 22
8 14 18
2 13 22
2 16 18
10 12 22
1 9 22
7 9 19
5 8 22
3 12 19
4 6 22
10 13 19
18 20 21
2 15 19
11 19 21
6 16 19
9 17 21
14 17 19
3 16 21
3 4 20
8 15 21
5 6 20
10 14 21
13 14 20
12 13 21
1 7 21
9 15 20
2 5 21
1 19 20
10 16 20
8 17 20
1 2 26
3 4 26
5 6 26
7 8 26
9 10 26
11 12 26
13 14 26
15 16 26
17 18 26
19 20 26
21 22 26
23 24 26
14 25 26