C(75,25,2) = 13

Created by: LJCR

Method of Construction: Multiple of (15,5,2) covering

Lower Bound: Bounds for fixed number of blocks

  1  2  3  8 11 16 17 18 23 26 31 32 33 38 41 46 47 48 53 56 61 62 63 68 71
  1  4  6 11 15 16 19 21 26 30 31 34 36 41 45 46 49 51 56 60 61 64 66 71 75
  1  4 10 11 12 16 19 25 26 27 31 34 40 41 42 46 49 55 56 57 61 64 70 71 72
  1  5 11 13 14 16 20 26 28 29 31 35 41 43 44 46 50 56 58 59 61 65 71 73 74
  1  7  9 11 15 16 22 24 26 30 31 37 39 41 45 46 52 54 56 60 61 67 69 71 75
  2  4  8  9 13 17 19 23 24 28 32 34 38 39 43 47 49 53 54 58 62 64 68 69 73
  2  5  6  7 10 17 20 21 22 25 32 35 36 37 40 47 50 51 52 55 62 65 66 67 70
  2  5 12 14 15 17 20 27 29 30 32 35 42 44 45 47 50 57 59 60 62 65 72 74 75
  3  4  5  7 14 18 19 20 22 29 33 34 35 37 44 48 49 50 52 59 63 64 65 67 74
  3  6  9 12 14 18 21 24 27 29 33 36 39 42 44 48 51 54 57 59 63 66 69 72 74
  3  8 10 13 15 18 23 25 28 30 33 38 40 43 45 48 53 55 58 60 63 68 70 73 75
  5  8  9 10 14 20 23 24 25 29 35 38 39 40 44 50 53 54 55 59 65 68 69 70 74
  6  7  8 12 13 21 22 23 27 28 36 37 38 42 43 51 52 53 57 58 66 67 68 72 73