The generator matrix

 1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  2  1  1  2  2
 0 12  0 12  0 12  8  4  0 12  0 12  0 12  8  4  8  4  4 12 12
 0  0  8  0  0  0  8  0  0  8  8  8  0  8  8  8  0  8  0  0  0
 0  0  0  8  0  0  0  8  8  8  8  8  8  0  8  0  8  8  8  0  0
 0  0  0  0  8  8  8  8  8  0  0  8  0  8  8  8  0  0  0  0  8

generates a code of length 21 over Z16 who´s minimum homogenous weight is 18.

Homogenous weight enumerator: w(x)=1x^0+25x^18+16x^19+49x^20+352x^21+26x^22+16x^23+13x^24+13x^26+1x^36

The gray image is a code over GF(2) with n=168, k=9 and d=72.
This code was found by Heurico 1.16 in 0.0128 seconds.