The generator matrix

 1  0  0  1  1  1  1  1  1  1  1  1  1  1 a^6*X  1  1  1  1  1
 0  1  0  1  a a^2 a^6*X+a^3 a^6*X+a^4 a^5 a^6 a^6*X a^6*X+1 X+a X+a^2  1 a^6*X+a^5  X a^5*X+1 a^5*X+a^3 a^6*X+a
 0  0  1 a^6  a a^4  1 a^5 a^3 a^2 a^3*X+1 a*X+a^5 a^6*X a^5*X+a^2 X+a^6 X+1 a^5*X+a^3 a^6*X+a a^5*X+a^6 a*X+a^2

generates a code of length 20 over F8[X]/(X^2) who´s minimum homogenous weight is 126.

Homogenous weight enumerator: w(x)=1x^0+728x^126+5544x^127+4459x^128+1344x^133+10192x^134+33264x^135+14791x^136+39424x^140+9408x^141+35672x^142+79464x^143+27755x^144+21x^152+77x^160

The gray image is a linear code over GF(8) with n=160, k=6 and d=126.
This code was found by Heurico 1.16 in 2.8 seconds.