C(57,20,2) = 12
Created by: LJCR
Method of Construction: Simple construction from (58,20,2)
Lower Bound: Bounds for fixed number of blocks
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
1 2 3 4 9 10 17 18 21 22 23 24 25 26 27 28 29 30 31 32
1 2 3 4 9 10 33 34 35 36 37 38 39 40 41 42 43 44 45 46
1 2 5 6 8 9 10 15 16 47 48 49 50 51 52 53 54 55 56 57
3 4 7 8 11 12 17 18 35 36 37 38 45 46 49 50 53 54 55 56
3 4 13 14 17 18 19 33 34 37 38 39 40 43 44 47 48 51 52 57
5 6 7 8 11 12 15 16 25 26 29 30 31 32 33 34 39 40 43 44
5 6 13 14 15 16 21 22 23 24 27 28 35 36 37 38 41 42 45 46
7 8 11 12 17 18 21 22 23 24 27 28 41 42 45 47 48 51 52 57
13 14 19 20 25 26 29 30 31 32 41 42 43 44 49 50 53 54 55 56
19 20 21 22 23 24 27 28 33 34 39 40 43 44 49 50 53 54 55 56
19 20 25 26 29 30 31 32 35 36 37 38 40 45 46 47 48 51 52 57