The generator matrix

 1  0  0  1  1  1 3X+2  1 X+2  1  1 2X+2  X  1  1  1  1  1
 0  1  0  1 3X 3X+3  1 X+2 2X+2 3X+1 2X  1  1  3 2X+3 2X+1 X+3  0
 0  0  1  1 2X+3  X X+1 3X+3  1 2X+2  X 3X+3  X 3X 3X+2 X+1 2X+1  0
 0  0  0 2X  0  0  0 2X 2X 2X 2X 2X 2X  0 2X 2X 2X  0

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

Homogenous weight enumerator: w(x)=1x^0+62x^14+368x^15+984x^16+1436x^17+2556x^18+1424x^19+902x^20+336x^21+94x^22+16x^23+9x^24+4x^25

The gray image is a code over GF(2) with n=144, k=13 and d=56.
This code was found by Heurico 1.16 in 0.125 seconds.