The generator matrix

 1  0  0  0  1  1  1  6  1  1  1  1  1  1  1  1  1  3
 0  1  0  0  6  1  7  1  0  6  1  4  8  4  2  2  3  0
 0  0  1  0  7  1  5  7  6  2  8  4  7  1  3  7  6  1
 0  0  0  1  5  3  8  2  4  2  1  8  1  4  3  8  2  7

generates a code of length 18 over Z9 who´s minimum homogenous weight is 29.

Homogenous weight enumerator: w(x)=1x^0+258x^29+248x^30+840x^32+456x^33+1224x^35+688x^36+1344x^38+632x^39+654x^41+156x^42+54x^44+4x^45+2x^48

The gray image is a code over GF(3) with n=54, k=8 and d=29.
This code was found by Heurico 1.13 in 0.079 seconds.