The generator matrix

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

generates a code of length 14 over Z9 who´s minimum homogenous weight is 18.

Homogenous weight enumerator: w(x)=1x^0+182x^18+156x^21+364x^24+364x^27+4374x^28+546x^30+364x^33+182x^36+28x^42

The gray image is a code over GF(3) with n=42, k=8 and d=18.
This code was found by Heurico 1.16 in 0.265 seconds.