C(31,18,2) = 5

Created by: LJCR

Method of Construction: Simple construction from (30,17,2)

Lower Bound: Bounds for fixed number of blocks

  1  2  3  4  6  7  8 12 13 17 19 21 23 25 27 28 29 31
  1  2  4  5  6  7 10 15 17 18 19 21 23 24 25 27 28 31
  1  2  4  6  9 11 14 16 19 20 21 22 23 25 26 27 30 31
  3  5  8  9 10 11 12 13 14 16 18 20 22 24 26 29 30 31
  3  7  8  9 11 12 13 14 15 16 17 20 22 26 28 29 30 31