C(30,15,2) = 6

Created by: LJCR

Method of Construction: Multiple of (10,5,2) covering

Lower Bound: Schonheim

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