11 ≤ C(31,17,3) ≤ 12

Created by: Jan de Heer and Steve Muir

Method of Construction: Private tools

Lower Bound: Schonheim

  1  2  3  5  6  8 12 13 16 17 19 23 24 25 27 28 31
  1  2  3  6  7 11 12 13 14 16 17 18 22 23 25 29 30
  1  2  4  5  7 11 12 13 15 18 22 23 24 26 27 29 30
  1  2  4  8  9 10 12 13 14 15 19 20 21 23 24 26 31
  1  3  4  6 10 11 12 15 16 17 21 22 23 25 26 28 30
  1  3  7  8  9 11 12 16 18 19 20 22 23 25 29 30 31
  1  5  6  7  9 10 12 14 17 18 20 21 23 24 27 28 29
  2  3  4  6  7  9 13 15 16 17 18 20 24 25 26 28 29
  2  3  5  9 10 11 13 14 16 20 21 22 24 25 27 28 30
  2  6  7  8 10 11 13 17 18 19 21 22 24 28 29 30 31
  3  4  5  7  8 10 14 15 16 18 19 21 25 26 27 29 31
  4  5  6  8  9 11 14 15 17 19 20 22 26 27 28 30 31