C(24,13,2) = 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 13
  1  2 14 15 16 17 18 19 20 21 22 23 24
  3  4  5  6  7  8  9 14 15 16 17 18 19
  3  4  5  6  7  8  9 10 20 21 22 23 24
 10 11 12 13 14 15 16 17 18 19 20 21 22
  1  2  3  4  5  6  7  8 11 12 13 23 24