The generator matrix

 1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  X  X  X  X  X  1  1  X  X  X  1
 0  3  0  3  0  3  6  6  6  0  0  3  3  0  3  6  6  6  0  3  3  0  3  0  3  6  6  6  0
 0  0  3  6  6  3  0  3  6  0  3  6  3  6  0  0  3  6  3  6  3  6  0  0  6  0  6  3  3

generates a code of length 29 over Z9[X]/(X^2+6,3X) who´s minimum homogenous weight is 57.

Homogenous weight enumerator: w(x)=1x^0+54x^57+162x^58+12x^60+8x^63+6x^66

The gray image is a code over GF(3) with n=261, k=5 and d=171.
This code was found by Heurico 1.16 in 0.00466 seconds.