13 ≤ C(21,11,3) ≤ 14
Created by: LJCR
Method of Construction: Simple construction: induced from (22,12,4)
Lower Bound: Horsley-Singh, Theorem 6, s=1
1 2 3 4 11 15 16 17 18 20 21
1 2 3 5 6 7 9 11 12 14 17
1 2 3 8 10 11 13 14 17 18 19
1 3 4 6 7 9 10 15 16 17 18
1 3 5 7 10 12 13 14 16 20 21
1 4 5 8 12 13 14 15 16 18 19
1 6 7 8 9 13 14 18 19 20 21
2 4 5 7 10 11 12 13 15 17 21
2 4 6 8 9 11 14 15 17 19 21
2 5 7 8 11 12 16 17 18 19 20
2 6 9 10 11 13 14 16 17 18 20
3 4 5 6 9 12 13 15 17 19 20
3 4 7 8 10 13 14 15 17 19 20
3 5 6 8 9 10 12 16 18 19 21