C(51,19,2) = 11

Method of Construction: Simple construction from (50,18,2)

Lower Bound: Bounds for fixed number of blocks

  1  2  3  4  5  6  7  8  9 26 27 28 29 30 31 32 33 34 51
  1 10 11 12 13 14 15 16 17 26 35 36 37 38 39 40 41 42 51
  1 18 19 20 21 22 23 24 25 26 43 44 45 46 47 48 49 50 51
  2  3  4  5  6 16 17 24 25 27 28 29 30 31 41 42 49 50 51
  2  3  4 10 11 12 18 19 20 27 28 29 35 36 37 43 44 45 51
  2  3  4 13 14 15 21 22 23 27 28 29 38 39 40 46 47 48 51
  5  6  7 10 11 12 21 22 23 30 31 32 35 36 37 46 47 48 51
  5  6  7 13 14 15 18 19 20 30 31 32 38 39 40 43 44 45 51
  7  8  9 15 16 17 23 24 25 32 33 34 40 41 42 48 49 50 51
  8  9 10 11 12 13 14 24 25 33 34 35 36 37 38 39 49 50 51
  8  9 16 17 18 19 20 21 22 33 34 41 42 43 44 45 46 47 51