29 ≤ C(15,8,4) ≤ 30
Method of Construction: simple construction: deleted element from c(v+1,k,t) covering
Lower Bound: Schonheim
1 2 5 6 11 12 14 15
3 4 7 8 9 10 13 14
1 4 5 8 10 11 14 15
1 2 3 6 7 9 12 13
1 3 6 8 9 10 11 14
2 4 5 7 10 12 13 15
1 3 6 8 10 12 13 15
2 4 5 6 7 9 11 14
1 2 3 4 9 10 11 12
3 5 6 7 8 13 14 15
1 2 7 8 11 12 13 14
1 3 4 5 6 9 10 15
1 4 6 7 10 11 13 14
2 3 5 8 9 12 14 15
1 2 3 4 5 6 7 8
3 9 10 11 12 13 14 15
1 4 5 8 9 12 13 14
2 3 6 7 10 11 14 15
1 2 7 8 9 10 12 15
3 4 5 6 11 12 13 14
1 3 5 7 9 11 13 15
2 4 6 8 10 12 13 14
1 2 3 4 6 13 14 15
5 6 7 8 9 10 11 12
1 4 6 7 9 12 14 15
2 3 5 8 10 11 13 14
1 3 4 5 7 10 12 14
2 4 6 8 9 11 13 15
1 2 5 6 9 10 13 14
3 4 7 8 11 12 14 15