The generator matrix

 1  0  1  1  1 12  1  1 10  1  1  6  0  8  1  1  1  1  0  8 12
 0  1  1 12 11  1  2  7  1  6  5  1  0  4  1 15  4  2  1  1  1
 0  0  2  6  4  6  2  2  6  0  0  8  2  2  4  0  4  4  8  4  6
 0  0  0  8  0  0  0  8  8  8  8  8  0  8  0  0  0  0  8  0  0
 0  0  0  0  8  0  0  0  0  8  0  8  8  8  0  8  0  8  0  8  0
 0  0  0  0  0  8  0  0  8  0  0  0  8  8  0  0  8  8  8  8  0
 0  0  0  0  0  0  8  8  8  8  8  8  8  0  8  8  8  8  8  0  8

generates a code of length 21 over Z16 who´s minimum homogenous weight is 15.

Homogenous weight enumerator: w(x)=1x^0+44x^15+229x^16+184x^17+2083x^18+2708x^19+6882x^20+8464x^21+6942x^22+2708x^23+2088x^24+184x^25+188x^26+44x^27+14x^28+2x^30+2x^32+1x^34

The gray image is a code over GF(2) with n=168, k=15 and d=60.
This code was found by Heurico 1.16 in 2.24 seconds.