C(24,11,2) = 7

Method of Construction: simple construction: deleted element from c(v+1,k,t) covering

Lower Bound: Schonheim

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