C(22,12,2) = 6

Method of Construction: lex covering

Lower Bound: Bounds for fixed number of blocks

  1  2  3  4  5  6  7  8  9 10 11 12
  1  2 13 14 15 16 17 18 19 20 21 22
  3  4  5  6  7  8 13 14 15 16 17 18
  3  4  5  6  7  8  9 10 19 20 21 22
  9 10 11 12 13 14 15 16 17 18 19 20
  1  2  3  4  5  6  7  8 11 12 21 22