The generator matrix

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

generates a code of length 18 over Z4[X]/(X^3+2,2X) who´s minimum homogenous weight is 14.

Homogenous weight enumerator: w(x)=1x^0+24x^14+98x^15+242x^16+416x^17+514x^18+420x^19+199x^20+80x^21+36x^22+10x^23+5x^24+2x^26+1x^28

The gray image is a code over GF(2) with n=144, k=11 and d=56.
This code was found by Heurico 1.16 in 0.016 seconds.