The generator matrix

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

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

Homogenous weight enumerator: w(x)=1x^0+70x^18+196x^21+338x^24+574x^27+980x^30+1274x^33+13122x^34+1202x^36+962x^39+596x^42+286x^45+76x^48+6x^51

The gray image is a code over GF(3) with n=51, k=9 and d=18.
This code was found by Heurico 1.16 in 0.579 seconds.