The generator matrix

 1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1
 0  3  0  0  0  3  3  3 3a 6a+3  0  3 3a 6a+6 6a 6a+6  6  6 3a+6 6a 3a+3  0
 0  0  3  0  0 3a+6 6a+6 3a  6 3a+6  3 3a+6 3a 3a+3  3  3 3a+6 3a+3  6 3a  0  0
 0  0  0  3  0 3a+6  3 3a+3 3a+3 6a+6 6a+3 6a+6 6a+3 6a  3 6a  3  3 3a+3 3a+3  3  0
 0  0  0  0  3 6a+6  6 6a+3  3  3 3a 3a  3 3a+3  0 6a  6 3a  3  0  6 3a

generates a code of length 22 over GR(81,9) who´s minimum homogenous weight is 135.

Homogenous weight enumerator: w(x)=1x^0+200x^135+1832x^144+3888x^153+7192x^162+12560x^171+472392x^176+16776x^180+12488x^189+4112x^198

The gray image is a code over GF(9) with n=198, k=6 and d=135.
This code was found by Heurico 1.16 in 25.5 seconds.