15 ≤ C(30,21,5) ≤ 20

Created by: LJCR

Method of Construction: Multiple of (10,7,5) covering

Lower Bound: Schonheim

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