C(25,14,2) = 5

Method of Construction: induced from a (27,15,2) covering

Lower Bound: Bounds for fixed number of blocks

  1  2  3  4  5  9 10 11 12 13 18 19 20 21
  1  6  7  8  9 14 15 16 17 18 22 23 24 25
  2  3  4  6  7 10 11 12 14 15 19 20 22 23
  2  3  4  8 10 11 12 16 17 19 20 23 24 25
  5  6  7  8 13 14 15 16 17 21 22 23 24 25