The generator matrix

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

generates a code of length 17 over Z9 who´s minimum homogenous weight is 18.

Homogenous weight enumerator: w(x)=1x^0+176x^18+426x^21+910x^24+1760x^27+3144x^30+13122x^32+3870x^33+26244x^35+3912x^36+2910x^39+1680x^42+712x^45+162x^48+20x^51

The gray image is a code over GF(3) with n=51, k=10 and d=18.
This code was found by Heurico 1.16 in 3.82 seconds.