C(15,11,6) = 21

Method of Construction: dynamic programming covering

Lower Bound: Schonheim

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