The generator matrix

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

generates a code of length 20 over Z9[X]/(X^2+3,3X) who´s minimum homogenous weight is 37.

Homogenous weight enumerator: w(x)=1x^0+366x^37+276x^38+12x^39+672x^40+468x^41+10x^42+366x^43+2x^45+12x^47+2x^51

The gray image is a code over GF(3) with n=180, k=7 and d=111.
This code was found by Heurico 1.16 in 5.45 seconds.