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

generates a code of length 24 over GR(81,9) who´s minimum homogenous weight is 153.

Homogenous weight enumerator: w(x)=1x^0+456x^153+2640x^162+4784x^171+8048x^180+52488x^184+13128x^189+419904x^193+16240x^198+10432x^207+3320x^216

The gray image is a code over GF(9) with n=216, k=6 and d=153.
This code was found by Heurico 1.16 in 30.4 seconds.