lower bound = 19

C(11,3,2) = 19

Method of Construction: random greedy covering

Lower Bound: Schonheim

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