The generator matrix

 1  0  1  1  1  1  1  0  1  1  1  1  0  1  1  1  1  1
 0  1  1  8  0  7  8  1  8  0  0  7  1  8  2  3  2  6
 0  0  6  0  0  6  0  3  3  0  6  3  3  0  3  6  6  6
 0  0  0  3  0  6  6  6  6  3  0  0  3  6  0  3  3  0
 0  0  0  0  3  3  3  0  6  6  3  0  3  6  3  0  6  6

generates a code of length 18 over Z9 who´s minimum homogenous weight is 30.

Homogenous weight enumerator: w(x)=1x^0+232x^30+436x^33+778x^36+616x^39+100x^42+4x^45+16x^48+4x^51

The gray image is a code over GF(3) with n=54, k=7 and d=30.
This code was found by Heurico 1.16 in 27.4 seconds.