19 ≤ C(17,10,4) ≤ 23

Method of Construction: nurmela-ostergard simulated annealing covering

Lower Bound: Schonheim

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