The generator matrix

 1  0  1  1  1  1  1
 0  1  1  a 7a+7 8a+4  0
 0  0 3a+6  0 3a+6  3  3
 0  0  0  3 3a+6 3a+6 3a

generates a code of length 7 over GR(81,9) who´s minimum homogenous weight is 36.

Homogenous weight enumerator: w(x)=1x^0+280x^36+648x^40+840x^45+29160x^48+10368x^49+2576x^54+209952x^56+233280x^57+41472x^58+2864x^63

The gray image is a code over GF(9) with n=63, k=6 and d=36.
This code was found by Heurico 1.16 in 1.19 seconds.