C(9,8,4) = 5

Method of Construction: lex covering

Lower Bound: Schonheim

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