The generator matrix

 1  0  0  1  1  1  1  1  1 2X+3  1  1  1  1  1  1  1  1
 0  1  0 2X+3  1 2X+4  8  6 X+8  1 2X+7 2X+5  X X+7 2X+6 X+4 X+6 2X+4
 0  0  1 2X+4  1 2X+3 2X+8  2  X  4 2X+5 2X+1 2X  6 X+8  5  0  2

generates a code of length 18 over Z9[X]/(X^2+3,3X) who´s minimum homogenous weight is 31.

Homogenous weight enumerator: w(x)=1x^0+276x^31+864x^32+1270x^33+2184x^34+2268x^35+4188x^36+4104x^37+2862x^38+1248x^39+390x^40+14x^42+12x^43+2x^45

The gray image is a code over GF(3) with n=162, k=9 and d=93.
This code was found by Heurico 1.16 in 0.153 seconds.