lower bound = 66

C(11,5,4) = 66

Method of Construction: simple construction: induced on c(12,6,5) covering

Lower Bound: Schonheim

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