The generator matrix

 1  1  1  1  1  1  1  1  X  X  X  X  X  X  X  X  1  1
 0  2  0  0  0  2  2  2  0  0  2  2  0  2  2  0  0  0
 0  0  2  0  2  2  2  0  0  2  2  0  2  2  0  0  0  0
 0  0  0  2  2  0  2  2  2  2  0  0  0  2  2  0  0  0

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

Homogenous weight enumerator: w(x)=1x^0+7x^16+46x^18+8x^20+2x^26

The gray image is a code over GF(2) with n=72, k=6 and d=32.
This code was found by Heurico 1.16 in 0.00119 seconds.