18 ≤ C(48,13,2) ≤ 19

Created by: LJCR

Method of Construction: Simple construction from (49,13,2)

Lower Bound: Horsley, Theorem 1, r=4, d=1

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