The generator matrix

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

generates a code of length 18 over Z4[X]/(X^3+2,2X) who´s minimum homogenous weight is 16.

Homogenous weight enumerator: w(x)=1x^0+15x^16+224x^18+15x^20+1x^36

The gray image is a code over GF(2) with n=144, k=8 and d=64.
This code was found by Heurico 1.16 in 3.62e-008 seconds.