24 ≤ C(18,10,4) ≤ 26

Created by: Rade Belic and Dietmar Pree

Lower Bound: Schonheim

  2  3  4  5  6  7 12 13 16 17
  1  5  7  8  9 10 12 13 14 18
  2  3  8  9 10 11 12 13 16 17
  2  4  6  7  9 10 11 12 13 14
  1  2  3 12 13 14 15 16 17 18
  1  3  7  8 10 11 12 16 17 18
  1  2  4  6  7  8 12 13 15 18
  1  4  6  7 10 11 13 15 16 17
  1  2  5  9 10 11 12 13 15 18
  5  7 10 11 13 14 15 16 17 18
  1  4  6  8  9 10 11 14 15 18
  3  4  5  6  7  8 10 11 13 18
  1  3  5  8  9 13 15 16 17 18
  1  2  3  7  9 10 14 15 16 17
  4  6  7  8  9 13 14 16 17 18
  1  2  3  5  8 10 11 13 14 15
  1  2  3  4  5  6  8  9 11 12
  2  3  4  5  6 10 12 14 15 18
  2  3  7  8  9 11 12 14 15 18
  1  3  4  5  6  9 10 16 17 18
  2  4  6  9 11 12 15 16 17 18
  2  5  7  8 10 12 15 16 17 18
  1  2  5  7  9 11 12 14 16 17
  1  2  4  6  8 10 12 14 16 17
  1  3  4  5  6  7  9 13 14 15
  3  4  5  6  8 11 14 15 16 17