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

generates a code of length 28 over Z9[X]/(X^2+3,3X) who´s minimum homogenous weight is 49.

Homogenous weight enumerator: w(x)=1x^0+180x^49+248x^51+180x^52+1648x^54+450x^55+2916x^57+306x^58+208x^60+306x^61+44x^63+36x^64+28x^69+8x^72+2x^78

The gray image is a code over GF(3) with n=252, k=8 and d=147.
This code was found by Heurico 1.16 in 80.5 seconds.