lower bound = 11

C(11,6,3) = 11

Method of Construction: cyclic covering found by a search program

Lower Bound: Schonheim

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