The generator matrix

 1  0  1  1  1  1  1  1  1  1  1  1  1  1  1  0  1  1  1  0  1  1  1  1  3  1  1  1  1  1 3a  1  1  3  1  1  1  1  1  1  1  1  1  1  1
 0  1  1  a 7a+7 8a+4 3a+5 8a+5 8a a+5  0 a+5 8a 8a+5 8a+4  1  a 7a+7 8a+5  1 3a+7 8a  0  a  1 8a+4 3a+5 7a+7 a+3 3a+5  1 6a+5 3a+7  1 8a+7 a+7 a+7 8a+3 4a+7 4a 2a+4 8a+3 2a+5  3  0
 0  0 3a+6  0 3a+6  3 6a+6 6a+6  6 3a 3a+6 3a  3 3a  3  3 6a+6  6  6 3a+6 3a+6 6a 3a+3  6  3 6a  0  3  0  0 6a+3  3 6a+3  0 3a  6 3a+3 6a+3 6a+6 3a+6 6a+3 6a+6 3a 3a+3  0
 0  0  0  3 3a+6 3a+6  3 3a  3 3a+3 6a 6a+6 6a 6a+3  0 6a+6 3a+3 3a+6 6a+3  6 3a 3a 3a 3a+3  3 6a+3 6a  3 6a+6 3a+3 3a+6 6a+3 3a+3  6 6a+3 6a+6 6a+3  3 6a+3 6a+6 3a+6 6a  6 6a  0

generates a code of length 45 over GR(81,9) who´s minimum homogenous weight is 324.

Homogenous weight enumerator: w(x)=1x^0+88x^324+216x^329+688x^333+72x^336+576x^337+3744x^338+2808x^339+1152x^342+648x^344+1728x^345+6048x^346+18576x^347+11016x^348+1000x^351+10368x^353+13824x^354+32832x^355+67392x^356+39528x^357+1000x^360+41472x^362+36864x^363+65520x^364+120024x^365+51624x^366+864x^369+808x^378+616x^387+288x^396+56x^405

The gray image is a code over GF(9) with n=405, k=6 and d=324.
This code was found by Heurico 1.16 in 25.3 seconds.