The generator matrix

 1  0  1  1  1  6  1  1 12  1  1 10  1  1  1  1  1  1
 0  1  3  6  5  1 12 15  1 10  9  1  8 14  4  2 11  0

generates a code of length 18 over Z16 who´s minimum homogenous weight is 17.

Homogenous weight enumerator: w(x)=1x^0+76x^17+101x^18+76x^19+1x^26+1x^28

The gray image is a code over GF(2) with n=144, k=8 and d=68.
This code was found by Heurico 1.16 in 0.00109 seconds.