21 ≤ C(23,10,3) ≤ 24
Method of Construction: simple construction: deleted element from c(v+1,k,t) covering
Lower Bound: Schonheim
1 2 3 5 6 8 12 13 15 21
2 3 4 6 7 9 13 14 16 22
3 4 5 7 8 10 14 15 17 23
4 5 6 7 8 9 11 15 16 18
1 5 6 7 9 10 12 16 17 19
2 6 7 8 10 11 13 17 18 20
3 7 8 9 11 12 14 18 19 21
4 8 9 10 12 13 15 19 20 22
5 9 10 11 13 14 16 20 21 23
6 7 10 11 12 14 15 17 21 22
1 7 11 12 13 15 16 18 22 23
2 4 8 12 13 14 16 17 19 23
1 3 9 13 14 15 17 18 19 20
1 2 4 10 14 15 16 18 19 21
2 3 5 11 15 16 17 19 20 22
3 4 6 12 16 17 18 20 21 23
4 5 7 13 17 18 19 20 21 22
1 5 6 8 14 18 19 20 22 23
2 6 7 9 15 17 19 20 21 23
1 3 7 8 10 13 16 20 21 22
1 2 4 8 9 11 17 21 22 23
2 3 5 9 10 12 18 19 22 23
1 3 4 6 10 11 13 16 19 23
1 2 4 5 7 8 11 12 14 20