The generator matrix

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

generates a code of length 13 over Z9 who´s minimum homogenous weight is 18.

Homogenous weight enumerator: w(x)=1x^0+60x^18+54x^22+72x^24+216x^25+20x^27+216x^28+90x^33

The gray image is a code over GF(3) with n=39, k=6 and d=18.
This code was found by Heurico 1.16 in 0.00166 seconds.