The generator matrix

 1  0  1  1  1  1  1  0  1  1  1  3  1
 0  1  1  8  0  1  8  1  0  0  0  3  3
 0  0  6  0  0  0  0  3  3  3  6  6  6
 0  0  0  3  0  0  3  6  6  0  6  6  6
 0  0  0  0  3  0  6  6  3  6  0  6  3
 0  0  0  0  0  6  3  6  3  3  3  0  3

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

Homogenous weight enumerator: w(x)=1x^0+174x^18+162x^20+324x^21+972x^23+414x^24+1944x^26+548x^27+1296x^29+630x^30+72x^33+6x^36+18x^39

The gray image is a code over GF(3) with n=39, k=8 and d=18.
This code was found by Heurico 1.16 in 0.0745 seconds.