C(56,21,2) = 11

Created by: LJCR

Method of Construction: Multiple of (8,3,2) covering

Lower Bound: Bounds for fixed number of blocks

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