11 ≤ C(30,20,4) ≤ 13

Created by: Alessandro Jurcovich

Method of Construction: ex 15

Lower Bound: Schonheim

  1  2  3  4  5  6  7  8  9 10 16 17 18 19 20 21 22 23 24 25
  1  2  3  4  5  6  7  8  9 11 16 17 18 19 20 21 22 23 24 26
  1  2  3  4  5  6  7  8  9 12 16 17 18 19 20 21 22 23 24 27
  1  2  3  4  5  6  7  8  9 13 16 17 18 19 20 21 22 23 24 28
  1  2  3  4  5  6  7  8  9 14 16 17 18 19 20 21 22 23 24 29
  1  2  3  4  5  6  7  8  9 15 16 17 18 19 20 21 22 23 24 30
  1  2  6  9 10 11 12 13 14 15 16 21 23 24 25 26 27 28 29 30
  1  3  7  8 10 11 12 13 14 15 16 17 19 23 25 26 27 28 29 30
  1  4  5 10 11 12 13 14 15 16 18 20 22 23 25 26 27 28 29 30
  2  3  4  8 10 11 12 13 14 15 18 19 21 22 25 26 27 28 29 30
  2  5  7 10 11 12 13 14 15 17 20 21 22 24 25 26 27 28 29 30
  3  5  6  8  9 10 11 12 13 14 15 19 20 24 25 26 27 28 29 30
  4  6  7  9 10 11 12 13 14 15 17 18 22 24 25 26 27 28 29 30