C(56,20,2) = 11

Created by: LJCR

Method of Construction: Multiple of (28,10,2) covering

Lower Bound: Bounds for fixed number of blocks

  1  2  3  4  5  6  7  8  9 10 29 30 31 32 33 34 35 36 37 38
  1 11 12 13 14 15 16 17 18 19 29 39 40 41 42 43 44 45 46 47
  1 20 21 22 23 24 25 26 27 28 29 48 49 50 51 52 53 54 55 56
  2  3  4  5 11 12 13 20 21 22 30 31 32 33 39 40 41 48 49 50
  2  3  4  5 14 15 16 23 24 25 30 31 32 33 42 43 44 51 52 53
  2  3  4  5 17 18 19 26 27 28 30 31 32 33 45 46 47 54 55 56
  6  7  8  9 11 12 13 23 24 25 34 35 36 37 39 40 41 51 52 53
  6  7  8  9 14 15 16 20 21 22 34 35 36 37 42 43 44 48 49 50
  6  7  8  9 17 18 19 26 27 28 34 35 36 37 45 46 47 54 55 56
 10 11 12 13 14 15 16 26 27 28 38 39 40 41 42 43 44 54 55 56
 10 17 18 19 20 21 22 23 24 25 38 45 46 47 48 49 50 51 52 53