The generator matrix

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

generates a code of length 17 over GR(81,9) who´s minimum homogenous weight is 99.

Homogenous weight enumerator: w(x)=1x^0+344x^99+2032x^108+4296x^117+10016x^126+17704x^135+472392x^136+16656x^144+8000x^153

The gray image is a code over GF(9) with n=153, k=6 and d=99.
This code was found by Heurico 1.16 in 17.1 seconds.