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  X  1  1  1
 0  X  0  0  0  X  X 4X  0 3X  X 6X 2X 6X  0 5X 4X 2X  X  X 4X 3X 5X 3X 2X  0 3X  X  X  0  0  X  X 3X 2X  0
 0  0  X  0  0 5X 4X 5X  X 4X 5X 5X  X  X  X 3X 3X 4X  X  0 6X 5X  X  0  0 5X 4X 5X 6X 6X 4X 5X 5X 4X  0  0
 0  0  0  X  0 5X 3X 3X 5X 5X  X 6X  0 2X 6X 2X 3X  X 3X 3X 2X 5X  X 4X 2X 3X 6X 3X 6X 2X 2X 4X 6X 2X 3X  0
 0  0  0  0  X 5X 6X  X 6X  X  X  0 2X  X  X 4X 6X 4X  0 3X 5X 4X 4X  0 4X  X 6X 6X  X 2X 3X  0 5X 2X  X  0

generates a code of length 36 over Z7[X]/(X^2) who´s minimum homogenous weight is 182.

Homogenous weight enumerator: w(x)=1x^0+276x^182+942x^189+1596x^196+1788x^203+16722x^210+89226x^217+2970x^224+2412x^231+1254x^238+408x^245+54x^252

The gray image is a linear code over GF(7) with n=252, k=6 and d=182.
This code was found by Heurico 1.16 in 7.2 seconds.