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