C(54,21,2) = 10

Created by: LJCR

Method of Construction: Multiple of (18,7,2) covering

Lower Bound: Bounds for fixed number of blocks

  1  2  3  5 10 14 18 19 20 21 23 28 32 36 37 38 39 41 46 50 54
  1  2  4  8 11 12 14 19 20 22 26 29 30 32 37 38 40 44 47 48 50
  1  2  6  7 14 15 17 19 20 24 25 32 33 35 37 38 42 43 50 51 53
  1  9 11 13 14 16 17 19 27 29 31 32 34 35 37 45 47 49 50 52 53
  2  9 11 12 13 15 16 20 27 29 30 31 33 34 38 45 47 48 49 51 52
  3  4  5 10 12 13 17 21 22 23 28 30 31 35 39 40 41 46 48 49 53
  3  5  6  7 10 11 18 21 23 24 25 28 29 36 39 41 42 43 46 47 54
  3  5  8  9 10 15 16 21 23 26 27 28 33 34 39 41 44 45 46 51 52
  4  6  7  9 15 16 18 22 24 25 27 33 34 36 40 42 43 45 51 52 54
  6  7  8 12 13 17 18 24 25 26 30 31 35 36 42 43 44 48 49 53 54