C(23,4,2) = 46
Method of Construction: simple construction: induced on c(24,5,3) covering
Lower Bound: Schonheim
3 4 9 11
1 3 10 12
1 5 11 12
1 2 6 13
4 5 8 13
2 4 10 14
4 7 9 15
2 3 7 16
4 6 12 16
7 11 13 17
6 14 15 17
8 12 16 17
7 8 10 18
9 12 14 18
2 5 15 18
6 8 9 19
3 8 14 19
12 13 15 19
10 11 16 19
2 5 17 19
5 9 10 20
11 13 14 20
1 15 16 20
3 6 17 20
1 4 18 20
6 7 10 21
8 11 15 21
5 14 16 21
1 9 17 21
3 13 18 21
18 19 20 21
5 7 14 22
9 13 16 22
4 10 17 22
6 11 18 22
1 7 19 22
2 8 20 22
2 12 21 22
3 5 6 23
2 9 11 23
1 8 14 23
10 13 15 23
16 17 18 23
7 12 20 23
4 19 21 23
3 15 22 23