C(17,9,2) = 6

Method of Construction: lex covering

Lower Bound: Schonheim

  1  2  3  4  5  6  7  8  9
  1 10 11 12 13 14 15 16 17
  2  3  4  5  6 10 11 12 13
  2  3  4  5  6 14 15 16 17
  7  8  9 10 11 12 13 14 15
  1  2  3  4  7  8  9 16 17