28 ≤ C(31,16,4) ≤ 30
Method of Construction: simple construction: deleted element from c(v+1,k,t) covering
Lower Bound: Schonheim
1 3 6 7 9 10 13 15 16 19 22 23 25 26 29 31
1 2 4 5 8 11 12 14 17 18 20 21 24 27 28 30
2 3 7 11 12 13 14 16 18 19 23 24 27 28 29 30
1 4 5 6 8 9 10 15 17 20 21 22 24 25 26 31
1 3 4 6 12 13 14 15 17 19 20 22 28 29 30 31
2 5 7 8 9 10 11 16 18 21 22 23 24 25 26 27
2 4 5 6 7 10 13 14 18 20 21 22 23 26 29 30
1 3 5 8 9 11 12 15 16 17 19 24 25 27 28 31
1 6 7 8 10 11 12 13 17 22 23 24 26 27 28 29
2 3 4 5 9 14 15 16 18 19 20 21 25 27 30 31
3 5 8 9 10 12 13 14 19 21 24 25 26 28 29 30
1 2 4 6 7 11 15 16 17 18 20 22 23 26 27 31
4 5 7 9 11 12 13 15 20 21 23 25 27 28 29 31
1 2 3 5 6 8 10 14 16 17 18 19 22 24 26 30
1 2 5 6 9 11 12 13 16 17 18 21 22 25 28 29
3 4 7 8 10 11 14 15 19 20 23 24 26 27 30 31
1 2 7 8 9 13 14 15 17 18 23 24 25 29 30 31
3 4 5 6 10 11 12 16 18 19 20 21 22 26 27 28
1 2 3 4 9 10 11 13 17 18 19 20 25 26 27 29
5 6 7 8 9 12 14 15 16 21 22 23 24 28 30 31
4 6 8 9 11 13 14 15 16 20 22 24 25 27 29 30
1 2 3 5 7 10 12 15 17 18 19 21 23 26 28 31
2 3 5 6 8 11 13 15 18 19 21 22 24 27 29 31
1 4 7 8 9 10 12 14 16 17 20 23 25 26 28 30
1 2 4 8 10 12 13 15 16 18 20 24 26 28 29 31
1 3 5 6 7 9 11 14 17 19 21 22 23 25 27 30
1 5 8 10 11 13 14 15 16 17 21 26 27 29 30 31
2 3 4 6 7 8 9 12 18 19 20 22 23 24 25 28
1 3 4 5 7 8 13 14 16 17 19 20 21 23 24 29
2 6 9 10 11 12 14 15 18 22 25 26 27 28 30 31