The check matrix of a [49,27,9]₂.

For more information see Inverting construction Y₁.

1000000000000000000000001100101001001101100110100
0100000000000000000001010100100111001001110000000
0010000000000000000000011001010010011011001100110
0001000000000000000001100011011101001010000010010
0000100000000000000000110010100100110110011000001
0000010000000000000001100000011011110000010110011
0000001000000000000000001010100100111001001110011
0000000100000000000000010101001001110010011100010
0000000010000000000000101010010011100100111000110
0000000001000000000001001111101011100110101100000
0000000000100000000001010101000100010100111010001
0000000000010000000001011110010000000110011100100
0000000000001000000001110110110011010101011010011
0000000000000100000000101111001000000011001110011
0000000000000010000000100111110101110011010110110
0000000000000001000001001011000110000001111100100
0000000000000000100001110111111000001100101110001
0000000000000000010001110010101101101101010110100
0000000000000000001001011100011111011010011010010
0000000000000000000101001010010011011001100010000
0000000000000000000011011110110101101010100110001
0000000000000000000000000000000000000000000001111

The weight distribution:

A'₀= 1, A'₄= 1, A'₁₂= 826, A'₁₃= 3584, A'₁₄= 5460, A'₁₅= 3584, A'₁₆= 20296, A'₁₇= 76704, A'₁₈= 114552, A'₁₉= 76704, A'₂₀= 113508, A'₂₁= 378336, A'₂₂= 568764, A'₂₃= 378336, A'₂₄= 206998, A'₂₅= 449600, A'₂₆= 672720, A'₂₇= 449600, A'₂₈= 145510, A'₂₉= 131520, A'₃₀= 198540, A'₃₁= 131520, A'₃₂= 34839, A'₃₃= 8736, A'₃₄= 12600, A'₃₅= 8736, A'₃₆= 2299, A'₃₇= 96, A'₃₈= 228, A'₃₉= 96, A'₄₀= 10.

A₀= 1, A₉= 436, A₁₀= 3031, A₁₁= 9903, A₁₂= 16536, A₁₃= 46497, A₁₄= 202416, A₁₅= 460560, A₁₆= 643910, A₁₇= 1284648, A₁₈= 3159180, A₁₉= 5063692, A₂₀= 5975976, A₂₁= 8403132, A₂₂= 12827264, A₂₃= 14904288, A₂₄= 14186244, A₂₅= 14330816, A₂₆= 14509170, A₂₇= 12259554, A₂₈= 9040040, A₂₉= 6576678, A₃₀= 4561200, A₃₁= 2787152, A₃₂= 1530273, A₃₃= 791928, A₃₄= 382108, A₃₅= 164316, A₃₆= 63640, A₃₇= 23036, A₃₈= 7200, A₃₉= 2112, A₄₀= 660, A₄₁= 108, A₄₂= 15, A₄₃= 7, A₄₅= 1.

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