C(52,18,2) = 12

Created by: LJCR

Method of Construction: Multiple of (26,9,2) covering

Lower Bound: Bounds for fixed number of blocks

  1  2  5 10 11 14 19 20 23 27 28 31 36 37 40 45 46 49
  1  3  9 10 12 16 18 19 21 27 29 35 36 38 42 44 45 47
  1  4  6 10 13 15 19 22 24 27 30 32 36 39 41 45 48 50
  1  7  8 10 16 17 19 25 26 27 33 34 36 42 43 45 51 52
  2  3  8 11 12 17 20 21 26 28 29 34 37 38 43 46 47 52
  2  4  7 11 13 16 20 22 25 28 30 33 37 39 42 46 48 51
  2  6  9 11 15 16 18 20 24 28 32 35 37 41 42 44 46 50
  3  4  5 12 13 14 21 22 23 29 30 31 38 39 40 47 48 49
  3  6  7 12 15 16 21 24 25 29 32 33 38 41 42 47 50 51
  4  5  8  9 13 17 18 22 26 30 31 34 35 39 43 44 48 52
  5  6  8 14 15 17 23 24 26 31 32 34 40 41 43 49 50 52
  5  7  8  9 14 16 18 23 25 31 33 34 35 40 42 44 49 51