C(55,18,2) = 13

Created by: LJCR

Method of Construction: Simple construction from (56,18,2)

Lower Bound: Schonheim

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