The generator matrix

 1  1  1  1  1  1  1  1  1  1
 0  X 2X  6 X+3 2X+6  3 X+6 2X+3  0

generates a code of length 10 over Z9[X]/(X^2+3,3X) who´s minimum homogenous weight is 18.

Homogenous weight enumerator: w(x)=1x^0+8x^18+216x^20+16x^21+2x^30

The gray image is a code over GF(3) with n=90, k=5 and d=54.
This code was found by Heurico 1.16 in 0.000247 seconds.