The generator matrix

 1  1  1  1  1  1  1  1  1  1  1  1  1  1  X  1  1  X  1  1  X  X  1  1  X  X X^2  X  1  X X^2  X X^2 X^3  0  X  1 X^2 X^2 X^3 X^2  1
 0 X^3  0 X^3  0 X^3  0 X^3  0 X^3  0 X^3  0 X^3 X^3  0 X^3 X^3  0 X^3 X^3  0  0 X^3  0 X^3 X^3  0  0 X^3 X^3  0  0 X^3 X^3  0 X^3  0 X^3  0  0  0

generates a code of length 42 over Z2[X]/(X^4) who´s minimum homogenous weight is 42.

Homogenous weight enumerator: w(x)=1x^0+1x^42+24x^43+1x^44+4x^45+1x^46

The gray image is a linear code over GF(2) with n=336, k=5 and d=168.
This code was found by Heurico 1.16 in 0.015 seconds.