The generator matrix

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

generates a code of length 84 over Z9[X]/(X^2+3,3X) who´s minimum homogenous weight is 165.

Homogenous weight enumerator: w(x)=1x^0+270x^165+72x^166+108x^167+1440x^168+72x^169+54x^170+20x^171+18x^172+126x^174+2x^189+4x^198

The gray image is a code over GF(3) with n=756, k=7 and d=495.
This code was found by Heurico 1.16 in 0.255 seconds.