C(18,6,3) = 48

Method of Construction: nurmela and ostergard simulated annealing cover

Lower Bound: Schonheim

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