C(18,14,5) = 9

Method of Construction: simple construction: multiple of smaller covering

Lower Bound: Schonheim

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