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

generates a code of length 71 over Z9 who´s minimum homogenous weight is 142.

Homogenous weight enumerator: w(x)=1x^0+54x^142+12x^144+6x^147+4x^150+2x^153+2x^159

The gray image is a code over GF(3) with n=213, k=4 and d=142.
This code was found by Heurico 1.16 in 0.0381 seconds.