The generator matrix

 1  0  0  1  1  1 2X  1  1 X+6  1  1  1 2X+3  1  1 2X  1
 0  1  0  1 2X+6  8  1  7  8  1 2X+8  0  X  6 2X+7  2  1 X+1
 0  0  1  8 2X+7  8 2X+1  7  X X+5 2X+1 X+8  7  1  0 X+8 X+8  3
 0  0  0 2X 2X+6  3 X+3 X+6 X+3  X  X X+6  6 2X+3 X+3  X  X 2X

generates a code of length 18 over Z9[X]/(X^2+6,3X) who´s minimum homogenous weight is 29.

Homogenous weight enumerator: w(x)=1x^0+444x^29+1672x^30+1404x^31+7356x^32+6702x^33+19602x^34+27678x^35+34960x^36+36288x^37+27798x^38+9718x^39+2484x^40+798x^41+156x^42+78x^44+4x^45+4x^48

The gray image is a code over GF(3) with n=162, k=11 and d=87.
This code was found by Heurico 1.16 in 144 seconds.