The generator matrix

 1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  0  1  1  1  1  X  1
 0  X  0  3 2X X+6  X 2X+6 2X  3 X+6 2X+6  0  3 2X+6  6 X+6 2X X+3 2X 2X+6  3  X  6 X+3  6  6 2X X+6
 0  0  X 2X+6  3 2X+6  X X+6 2X+3  3 X+6 2X  3 X+6  X  0  3 X+3  0 X+6 2X+6 2X  3 2X X+6 2X+6  3  6 2X+3

generates a code of length 29 over Z9[X]/(X^2+6,3X) who´s minimum homogenous weight is 54.

Homogenous weight enumerator: w(x)=1x^0+206x^54+324x^56+240x^57+486x^58+648x^59+174x^60+50x^63+48x^66+6x^69+2x^72+2x^81

The gray image is a code over GF(3) with n=261, k=7 and d=162.
This code was found by Heurico 1.16 in 0.0159 seconds.