15 ≤ C(26,18,5) ≤ 19

Created by: LJCR

Method of Construction: Multiple of (13,9,5) covering

Lower Bound: Schonheim

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