The generator matrix

 1  0  1  1  1  1
 0  1 2X+7  8  0  0
 0  0  6  0  3  0
 0  0  0  3  3  0

generates a code of length 6 over Z9[X]/(X^2+6,3X) who´s minimum homogenous weight is 6.

Homogenous weight enumerator: w(x)=1x^0+84x^6+160x^9+648x^10+4050x^12+1296x^13+312x^15+10x^18

The gray image is a code over GF(3) with n=54, k=8 and d=18.
This code was found by Heurico 1.16 in 0.00226 seconds.