C(51,21,2) = 9

Created by: LJCR

Method of Construction: Multiple of (17,7,2) covering

Lower Bound: Bounds for fixed number of blocks

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