The generator matrix

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

generates a code of length 18 over Z9[X]/(X^2+6,3X) who´s minimum homogenous weight is 28.

Homogenous weight enumerator: w(x)=1x^0+288x^28+828x^30+1260x^31+1782x^32+3276x^33+7596x^34+7128x^35+9420x^36+13104x^37+7128x^38+4500x^39+2358x^40+180x^42+180x^43+18x^48+2x^54

The gray image is a code over GF(3) with n=162, k=10 and d=84.
This code was found by Heurico 1.16 in 82.4 seconds.