15 ≤ C(25,15,4) ≤ 21

Created by: Rade Belic

Lower Bound: Schonheim

  1  2  3  4  5  6  7  8  9 10 11 13 17 18 19
  1  2  3  4  5  7 10 12 14 15 16 17 19 21 24
  1  2  3  5  6  9 11 12 16 20 21 22 23 24 25
  1  2  3  6  7  8  9 11 12 13 14 15 18 19 24
  1  2  3  9 12 13 14 16 17 19 20 21 22 23 25
  1  2  4  5  6  7 10 12 13 14 15 17 18 19 24
  1  2  4  5  6  7 14 16 18 19 20 21 22 23 25
  1  2  4  5  7  8  9 10 11 12 14 15 17 19 24
  1  2  8 10 11 14 15 16 19 20 21 22 23 24 25
  1  3  4  5  7 10 12 15 17 19 20 22 23 24 25
  1  3  6  8 11 12 16 17 18 19 20 21 22 23 25
  1  4  5  7  8  9 11 13 16 19 20 21 22 23 25
  1  6  9 10 13 15 16 18 19 20 21 22 23 24 25
  2  3  4  7 11 13 16 17 18 20 21 22 23 24 25
  2  3  5  6  8 10 13 15 16 17 20 21 22 23 25
  2  4  7  8  9 10 12 15 16 18 20 21 22 23 25
  3  4  5  6  8  9 10 11 12 13 14 15 17 18 24
  3  4  6  7  8  9 14 16 17 20 21 22 23 24 25
  3  5  9 10 11 14 15 16 17 18 20 21 22 23 25
  4  6  7 10 11 12 13 14 15 16 20 21 22 23 25
  5  8 11 12 13 14 15 16 18 20 21 22 23 24 25