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  0  X  2  X  0  X  2  X  0  X  X 2X  X  2 2X+2 2X  1  1
 0  X  2 3X+2  0 3X+2  2 3X  0 3X+2  2 3X  0 X+2 2X+2 3X 2X 3X+2  2  X 2X X+2 2X+2 3X 2X X+2 2X+2  X 2X X+2 2X+2  X 3X+2  X 3X  X 3X+2  X 3X  X 3X+2  X 3X  X  X X+2  X  X  0  0  0
 0  0 2X  0  0 2X 2X 2X 2X  0  0 2X 2X 2X  0  0 2X 2X  0  0 2X 2X  0  0  0  0 2X 2X  0  0 2X 2X  0  0 2X 2X  0  0 2X 2X 2X 2X  0  0 2X 2X  0  0  0  0  0
 0  0  0 2X 2X 2X 2X  0 2X  0  0 2X  0  0 2X 2X  0  0 2X 2X 2X 2X  0  0 2X 2X  0  0  0  0 2X 2X  0 2X 2X  0 2X  0  0 2X 2X  0  0 2X 2X  0  0 2X  0  0  0

generates a code of length 51 over Z4[X]/(X^2+2X+2) who´s minimum homogenous weight is 48.

Homogenous weight enumerator: w(x)=1x^0+30x^48+320x^50+30x^52+128x^54+1x^64+2x^68

The gray image is a code over GF(2) with n=408, k=9 and d=192.
This code was found by Heurico 1.16 in 0.094 seconds.