C(14,9,2) = 4

Method of Construction: lex covering

Lower Bound: Schonheim

  1  2  3  4  5  6  7  8  9
  1  2  3  4 10 11 12 13 14
  5  6  7  8  9 10 11 12 13
  1  2  3  5  6  7  8  9 14