lower bound = 8

C(16,7,2) = 8

Method of Construction: simple construction: induced on c(17,8,3) covering

Lower Bound: Handbook of Combinatorial Designs section on coverings

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