21 ≤ C(50,12,2) ≤ 23
Created by: LJCR
Method of Construction: Multiple of (25,6,2) covering
Lower Bound: Schonheim
1 2 11 12 14 15 26 27 36 37 39 40
1 3 9 10 18 20 26 28 34 35 43 45
1 4 5 21 24 25 26 29 30 46 49 50
1 6 8 16 17 19 26 31 33 41 42 44
1 7 13 21 22 23 26 32 38 46 47 48
2 3 4 6 13 14 27 28 29 31 38 39
2 5 14 18 19 23 27 30 39 43 44 48
2 7 8 9 21 25 27 32 33 34 46 50
2 7 10 14 17 24 27 32 35 39 42 49
2 8 14 16 20 22 27 33 39 41 45 47
3 4 12 17 18 22 28 29 37 42 43 47
3 5 7 8 12 16 28 30 32 33 37 41
3 11 17 21 23 25 28 36 42 46 48 50
3 15 19 22 24 25 28 40 44 47 49 50
4 7 9 11 19 20 29 32 34 36 44 45
4 8 10 15 16 23 29 33 35 40 41 48
5 6 9 10 11 22 30 31 34 35 36 47
5 9 13 15 17 20 30 34 38 40 42 45
6 7 15 18 21 25 31 32 40 43 46 50
6 9 12 20 23 24 31 34 37 45 48 49
8 11 13 16 18 24 33 36 38 41 43 49
9 14 16 20 21 25 34 39 41 45 46 50
10 12 13 19 21 25 35 37 38 44 46 50