The generator matrix

 1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  X  1  X  1  1  1  1  1  X  1  X  1  1  X  X  X  1  X  1  1 X^2  0  X  X X^2  2  1  1 X^2  X  X  X  X  1  1 X^2  0 X^2  2  2  X  X X^2  0 X^2  X X^2  X  2  X  X
 0 X^2+2  2 X^2  0 X^2+2  2 X^2  0 X^2+2  2 X^2  0 X^2+2  2 X^2  0 X^2+2  2 X^2 X^2+2  0 X^2 X^2+2  2 X^2  0 X^2+2 X^2+2  2 X^2 X^2  0  2  0 X^2+2  2 X^2 X^2+2 X^2 X^2+2 X^2  0  2 X^2 X^2  0  2  2 X^2+2 X^2  0  2 X^2+2 X^2 X^2+2 X^2 X^2 X^2  2  0  2  0  2  2 X^2+2  0 X^2  0  0  2

generates a code of length 71 over Z4[X]/(X^3+2,2X) who´s minimum homogenous weight is 72.

Homogenous weight enumerator: w(x)=1x^0+61x^72+2x^76

The gray image is a code over GF(2) with n=568, k=6 and d=288.
This code was found by Heurico 1.16 in 0.25 seconds.