lower bound = 32

C(11,6,4) = 32

Method of Construction: nurmela-ostergard simulated annealing covering design

Lower Bound: Schonheim

  1  2  3  5  6  8
  2  3  4  5  7  8
  2  3  5  6  7  9
  1  4  5  6  7  9
  2  3  4  7  8  9
  1  2  6  7  8  9
  1  2  3  6  7 10
  1  3  4  7  8 10
  1  2  5  7  8 10
  4  5  6  7  8 10
  1  2  4  5  9 10
  2  3  4  7  9 10
  2  4  6  8  9 10
  3  5  6  8  9 10
  1  2  3  4  6 11
  2  4  5  6  7 11
  1  2  4  7  8 11
  3  4  6  7  8 11
  1  3  4  5  9 11
  1  3  4  6  9 11
  1  2  3  7  9 11
  1  4  5  8  9 11
  2  5  6  8  9 11
  1  2  5  6 10 11
  3  4  5  6 10 11
  1  3  5  7 10 11
  2  3  5  8 10 11
  1  4  6  8 10 11
  2  4  7  9 10 11
  1  6  7  9 10 11
  1  3  8  9 10 11
  5  7  8  9 10 11