The generator matrix

 1  0  0  0  1  1  1  2 10  1 12  1  1  1 14 12 14  0  1  6  1  1  0  1  1  8  2  1  1  1  1  1  1  4  2 10  8  1  4  1  1  1  8  1  1 14  1 10  1  1  4  0  6  1  1  1  1  0  1  1  2  1 10  1  1  1  1
 0  1  0  0  0  9  5  1  1  8  1  4  7 11  0  1 10 10  2  1 10  5  1  7  6  4  1 11  0  3  1  2  8  1  4  1  1 11  1  1 13 12  6  0  1  2  1  1 10  0  1  1 12 11 12  2 15  4 14  5  8 15  1 12  5  3  0
 0  0  1  0  1  1  4  5  2 10  3  3 12  5  1  5  1 14  3 10 14  7  8  8 14  1  3  2  3  4 15  1 14 14  1 12 12 13  1  9  4 15  1  8  2  8 14  4 14  6  5  9  4 13 14  9  4  1  1  3 10  7  8  0  7 14  0
 0  0  0  1  1  4  1  1 15  9  6 10 14 11  9  5  3  1  1 10  7 11 11 11 10 10  8 12  4 13  2  4 10  5  2  5  6  0 13  3  6 15  2  2 14  1 15 14  5  7  3  1  1 13 13 12  4  3  6  8  1 12 14  3  5  1  0
 0  0  0  0 12  0  0  0  0  0  0  0  0  0  0  0  0  0  8  8  8  8  8  8  8  8  4  4 12  4  4  4 12  4 12 12  4 12 12 12 12  8  4  4 12 12 12  8 12  8  0  4  8  0  4  8  4  4  0 12  4  0 12  4  8  8  0

generates a code of length 67 over Z16 who´s minimum homogenous weight is 58.

Homogenous weight enumerator: w(x)=1x^0+104x^58+854x^59+2456x^60+4732x^61+8602x^62+13628x^63+21550x^64+28032x^65+32795x^66+34538x^67+35445x^68+28156x^69+21664x^70+13894x^71+8218x^72+4048x^73+1841x^74+964x^75+371x^76+130x^77+44x^78+38x^79+19x^80+4x^81+6x^82+4x^83+2x^84+2x^85+2x^88

The gray image is a code over GF(2) with n=536, k=18 and d=232.
This code was found by Heurico 1.16 in 587 seconds.