The generator matrix

 1  0  0  1  1  1  1  1  1 2X  0  1  X  1  1  1  1  1  1  X  1  1  X  1  1  1  X  1  X  1  1  X  1  0  1  1  0  1  X  1  1 2X  1  1  1  1  0  1 2X  1  X  1  1  1  1  1  X  1  1  1 2X  1 2X  1  0 2X  X  1  1  1  1  1  0  X  X
 0  1  0  0  X 2X+1  1  2 2X+1  1  1  2 2X 2X+1  1  1 X+2 2X+2  X  1  X 2X+2  1  1  0 X+2  1  1  0  0 2X+1  1  2  1 2X+2  2 2X 2X 2X 2X+2 2X+1  1  1  2  0  X  1  2  1 2X+1  1  X 2X+2 X+2  0  X  1  0  X  1  1 X+2  1 2X+1 2X  X  X X+1 2X+2 X+2  2 X+2  1  1  1
 0  0  1  1 2X+2 X+2 X+1  0 2X 2X+1 2X+2  X  1  2  1 2X 2X+1  2  X  0 X+2 X+1 X+2  1 X+1 2X+2 2X+1 X+2  1 2X+1  1 X+2  2  X  X 2X  1  0  1  1  1 X+2  2 2X X+1  1 X+1  2 X+1 X+1  2 2X+1 2X+2 2X+1  X 2X+1 2X+2  0  1 X+1 X+2 2X  0 2X+1  1  1  1  2  2 2X+2  1 X+1 X+1 2X+1  1
 0  0  0 2X 2X 2X 2X 2X  X 2X 2X  X 2X  0  X  0  X 2X 2X 2X  0 2X  0  0  0  X  0  X  X 2X  0 2X  X  0  0  X 2X  0  X 2X  X  0  X 2X  X  0  0 2X 2X  X 2X  X  0  0  X  0  0 2X 2X  0  X  0 2X 2X  X 2X 2X  0  0 2X 2X  0 2X  X  0

generates a code of length 75 over Z3[X]/(X^2) who´s minimum homogenous weight is 143.

Homogenous weight enumerator: w(x)=1x^0+276x^143+182x^144+348x^146+202x^147+252x^149+138x^150+234x^152+56x^153+132x^155+50x^156+96x^158+36x^159+42x^161+24x^162+54x^164+14x^165+12x^167+6x^168+6x^170+14x^171+6x^173+4x^174+2x^180

The gray image is a linear code over GF(3) with n=225, k=7 and d=143.
This code was found by Heurico 1.13 in 0.124 seconds.