24 ≤ C(19,8,3) ≤ 27
Method of Construction: simple construction: induced on c(20,9,4) covering
Lower Bound: Schonheim
1 2 3 4 12 13 17 18
6 9 11 14 15 16 17 18
7 8 10 11 13 14 18 19
1 2 3 6 12 14 18 19
4 6 8 9 10 11 13 14
4 5 6 7 10 14 17 18
3 5 6 9 10 13 15 18
3 5 7 8 16 17 18 19
3 4 9 11 15 17 18 19
1 2 5 10 11 12 16 18
3 4 6 7 8 13 16 18
2 6 10 12 13 16 17 19
1 2 7 8 9 12 15 18
2 5 8 11 12 13 15 17
1 3 4 5 10 13 15 19
2 5 6 7 9 11 12 19
2 4 6 7 8 12 15 19
2 4 7 8 9 10 12 16
2 3 8 10 12 14 15 16
1 3 6 7 10 11 15 17
1 3 8 9 11 13 16 19
1 4 5 6 8 9 16 17
2 3 7 9 12 13 14 17
1 4 7 11 14 15 16 19
2 3 4 5 11 12 14 18
1 5 6 7 13 14 15 16
1 5 8 9 10 14 17 19