The generator matrix

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

generates a code of length 6 over Z9 who´s minimum homogenous weight is 3.

Homogenous weight enumerator: w(x)=1x^0+12x^3+18x^4+60x^6+144x^7+160x^9+1404x^10+1698x^12+2520x^13+192x^15+288x^16+64x^18

The gray image is a code over GF(3) with n=18, k=8 and d=3.
This code was found by Heurico 1.16 in 0.00316 seconds.