The generator matrix

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

generates a code of length 20 over Z9[X]/(X^2+6,3X) who´s minimum homogenous weight is 38.

Homogenous weight enumerator: w(x)=1x^0+102x^38+218x^39+90x^40+204x^41+110x^42+2x^48+2x^51

The gray image is a code over GF(3) with n=180, k=6 and d=114.
This code was found by Heurico 1.16 in 0.00136 seconds.