The check matrix of a [28,21,6]₅. .

1000001213102410103323134202
0100002233014101023234343041
0010002130121010242330324321
0001001103220102413324413403
0000101031211024103232214033
0000010111110241012330133444
0000000000001111111111111111

The weight distribution:

A'₀= 1, A'₁₆= 252, A'₁₈= 2800, A'₁₉= 7840, A'₂₀= 3024, A'₂₁= 9856, A'₂₂= 12208, A'₂₃= 16128, A'₂₄= 17920, A'₂₅= 2800, A'₂₆= 4032, A'₂₇= 672, A'₂₈= 592,

A₀= 1, A₆= 27664, A₇= 243264, A₈= 2555112, A₉= 23257360, A₁₀= 176430240, A₁₁= 1151758944, A₁₂= 6534448704, A₁₃= 32160445632, A₁₄= 137850534720, A₁₅= 514566781120, A₁₆= 1672507557084, A₁₇= 4722195891504, A₁₈= 11543145682432, A₁₉= 24301653492480, A₂₀= 43742510174160, A₂₁= 66655635937344, A₂₂= 84834287851824, A₂₃= 88522723521792, A₂₄= 73768994165440, A₂₅= 47212119205104, A₂₆= 21790221406464, A₂₇= 6456359564704, A₂₈= 922337270032,

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