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

generates a code of length 26 over GR(81,9) who´s minimum homogenous weight is 171.

Homogenous weight enumerator: w(x)=1x^0+1160x^171+3128x^180+5456x^189+9120x^198+13800x^207+472392x^208+14640x^216+9232x^225+2512x^234

The gray image is a code over GF(9) with n=234, k=6 and d=171.
This code was found by Heurico 1.16 in 45.7 seconds.