The generator matrix

 1  0  1  1  1  0  1  1  0  1  1  1  1  1  1  0  X  1  1  1  1  0  X  1
 0  1  1  0  1  1  0 X+1  1  1  0  X X+1  0  X  1  1  0 X+1 X+1 X+1  1  X  0
 0  0  X  0  0  0  0  0  0  X  X  X  0  0  X  X  X  0  X  0  0  X  0  0
 0  0  0  X  0  0  0  X  0  X  X  0  0  X  0  X  X  X  X  0  X  X  X  0
 0  0  0  0  X  0  0  0  X  X  0  0  X  X  X  0  0  X  X  0  X  0  0  0
 0  0  0  0  0  X  0  X  X  X  0  0  0  0  0  0  X  X  0  X  X  0  X  0
 0  0  0  0  0  0  X  X  0  X  0  X  X  0  0  X  X  0  0  0  X  0  X  X

generates a code of length 24 over Z2[X]/(X^2) who´s minimum homogenous weight is 18.

Homogenous weight enumerator: w(x)=1x^0+23x^18+20x^19+48x^20+48x^21+40x^22+60x^23+39x^24+64x^25+49x^26+44x^27+27x^28+16x^29+11x^30+4x^31+12x^32+4x^34+1x^36+1x^38

The gray image is a linear code over GF(2) with n=48, k=9 and d=18.
This code was found by Heurico 1.16 in 0.016 seconds.