The generator matrix

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

generates a code of length 19 over GR(81,9) who´s minimum homogenous weight is 117.

Homogenous weight enumerator: w(x)=1x^0+768x^117+2936x^126+5456x^135+10976x^144+472392x^152+17944x^153+14712x^162+6256x^171

The gray image is a code over GF(9) with n=171, k=6 and d=117.
This code was found by Heurico 1.16 in 20.8 seconds.