28 ≤ C(25,13,4) ≤ 30
Created by: Andrei Ochmat
Lower Bound: Theorem 2.1 of Mills and Mullin; r=2
2 6 7 8 9 10 11 14 17 18 19 20 22
1 3 5 6 8 11 16 18 19 20 21 22 23
1 2 4 5 6 7 10 13 16 17 19 20 21
7 8 9 13 16 17 18 19 20 21 23 24 25
4 6 8 11 12 13 15 18 19 20 22 24 25
1 2 4 6 7 8 10 14 15 16 22 24 25
1 5 6 9 12 14 15 16 19 20 21 24 25
2 3 4 9 10 11 16 19 20 21 22 24 25
3 4 6 7 9 13 14 15 16 18 19 20 23
4 5 6 11 12 14 15 16 17 18 21 22 23
1 4 5 7 11 14 17 19 20 22 23 24 25
1 2 5 9 10 11 12 13 15 19 20 22 23
1 2 3 5 7 9 10 14 15 17 18 21 22
2 3 4 5 8 9 10 11 13 14 15 16 17
1 3 4 7 9 12 13 14 18 21 22 24 25
1 3 4 5 7 8 9 12 15 17 18 19 20
2 3 6 7 10 12 15 17 19 20 23 24 25
2 3 5 6 7 8 10 12 13 14 21 22 23
3 5 7 8 9 11 12 15 16 18 23 24 25
1 5 6 7 8 9 12 13 14 16 17 22 23
1 3 6 11 13 14 15 16 17 18 23 24 25
1 4 7 8 9 11 13 15 16 18 21 22 23
2 4 5 10 12 13 16 17 18 22 23 24 25
1 2 3 4 6 7 9 10 11 12 16 18 23
1 2 8 9 10 11 12 14 17 21 23 24 25
3 4 5 6 8 9 15 17 21 22 23 24 25
2 5 6 7 9 10 11 13 15 18 21 24 25
3 7 11 12 13 14 15 16 17 19 20 21 22
2 4 8 10 12 14 15 16 18 19 20 21 23
1 2 3 5 8 10 13 14 18 19 20 24 25