C(39,15,2) = 10

Created by: LJCR

Method of Construction: Multiple of (13,5,2) covering

Lower Bound: Schonheim

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