The generator matrix

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

generates a code of length 69 over Z16 who´s minimum homogenous weight is 60.

Homogenous weight enumerator: w(x)=1x^0+100x^60+758x^61+2281x^62+5086x^63+8443x^64+14586x^65+20372x^66+27716x^67+33099x^68+35742x^69+34344x^70+29054x^71+20795x^72+14158x^73+7550x^74+4484x^75+2167x^76+814x^77+295x^78+180x^79+59x^80+20x^81+22x^82+4x^83+6x^84+2x^85+4x^87+2x^88

The gray image is a code over GF(2) with n=552, k=18 and d=240.
This code was found by Heurico 1.16 in 666 seconds.