C(22,3,2) = 81
Method of Construction: simple construction: combined (21,3,2) and (21,2,1)-coverings
Lower Bound: Schonheim
10 12 21
10 13 16
10 14 17
1 10 20
1 11 12
11 13 14
12 15 20
1 13 19
1 14 15
14 18 19
15 17 21
1 16 17
16 18 21
19 20 21
2 11 21
2 12 13
2 14 20
2 15 16
2 17 18
2 3 5
1 2 4
2 6 19
2 7 8
2 9 10
3 10 15
3 11 16
3 12 14
3 17 19
3 18 20
1 3 21
3 4 13
3 6 8
3 7 9
4 10 19
4 11 20
4 15 18
4 5 17
4 6 21
4 7 14
4 8 16
4 9 12
5 11 19
5 12 16
5 13 20
1 5 18
5 6 10
5 7 21
5 8 14
5 9 15
6 11 17
6 12 18
6 13 15
6 14 16
1 6 7
6 9 20
7 10 11
7 12 17
7 13 18
7 15 19
7 16 20
8 10 18
8 11 15
8 12 19
8 13 21
8 17 20
1 8 9
9 11 18
9 13 17
9 14 21
9 16 19
1 2 22
3 4 22
5 6 22
7 8 22
9 10 22
11 12 22
13 14 22
15 16 22
17 18 22
19 20 22
4 21 22