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

generates a code of length 26 over Z9[X]/(X^2+3,3X) who´s minimum homogenous weight is 48.

Homogenous weight enumerator: w(x)=1x^0+144x^48+72x^49+72x^50+76x^51+1512x^52+72x^53+134x^54+18x^56+36x^58+48x^60+2x^78

The gray image is a code over GF(3) with n=234, k=7 and d=144.
This code was found by Heurico 1.16 in 26.7 seconds.