The generator matrix

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

generates a code of length 80 over Z3[X]/(X^2) who´s minimum homogenous weight is 156.

Homogenous weight enumerator: w(x)=1x^0+168x^156+292x^159+162x^162+64x^165+32x^168+6x^171+2x^198+2x^201

The gray image is a linear code over GF(3) with n=240, k=6 and d=156.
This code was found by Heurico 1.16 in 0.157 seconds.