C(17,12,3) = 6

Method of Construction: simple construction: added element to c(v-1,k-1,t) covering

Lower Bound: Bounds for fixed number of blocks

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