The generator matrix

 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  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  3  1  1  3  1  1  1  1  3  1  1  1  1  1  1  3  1  3  3  1  1  1  1  3  1
 0  3  0  0  0  0  0  0  0  0  3  6  6  3  3  3  0  6  3  6  3  0  3  0  6  3  0  6  3  6  6  6  3  3  3  0  6  6  0  0  0  3  6  3  0  6  3  6  3  6  6  0  3  3  0  0  6  3  3  0  0  6  6  6  6  3  0  0  0  3  6  6  0  3  0  0
 0  0  3  0  0  0  0  3  6  6  6  0  0  6  3  6  3  0  3  3  0  6  6  0  3  3  6  0  3  0  6  6  6  3  6  0  6  6  3  6  3  6  6  6  0  0  6  6  0  3  0  3  3  3  3  6  6  0  3  3  0  0  0  3  3  0  3  6  0  6  3  6  3  3  0  0
 0  0  0  3  0  0  3  6  0  6  0  0  6  3  3  6  0  3  0  6  0  6  6  0  6  0  3  6  6  3  3  3  6  0  0  6  6  3  6  3  0  6  6  3  3  6  3  6  6  0  3  6  6  6  3  3  0  6  3  3  3  0  6  3  0  6  0  6  0  0  3  6  3  3  3  3
 0  0  0  0  3  0  6  6  3  0  6  6  6  0  6  6  0  6  3  0  6  6  0  3  6  0  6  3  0  3  0  3  0  6  0  6  0  6  3  0  6  3  6  3  6  0  6  6  0  3  3  6  0  6  6  0  0  6  0  3  3  3  0  3  6  0  3  3  0  3  6  3  0  0  3  3
 0  0  0  0  0  3  6  6  6  6  6  6  3  6  3  3  6  3  6  6  6  6  0  6  0  3  0  0  6  3  6  0  6  3  0  3  3  0  3  0  0  3  6  3  3  3  3  0  3  3  6  3  3  6  6  3  3  6  0  0  3  0  6  0  0  6  6  0  3  0  6  3  6  6  0  6

generates a code of length 76 over Z9 who´s minimum homogenous weight is 141.

Homogenous weight enumerator: w(x)=1x^0+154x^141+186x^144+210x^147+516x^150+530x^153+276x^156+180x^159+32x^162+38x^168+30x^171+18x^177+2x^180+12x^186+2x^207

The gray image is a code over GF(3) with n=228, k=7 and d=141.
This code was found by Heurico 1.16 in 46.9 seconds.