The generator matrix

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

generates a code of length 91 over Z16 who´s minimum homogenous weight is 84.

Homogenous weight enumerator: w(x)=1x^0+138x^84+1002x^85+1641x^86+2456x^87+2782x^88+3706x^89+3151x^90+3788x^91+3298x^92+3432x^93+2436x^94+2170x^95+1011x^96+786x^97+476x^98+192x^99+98x^100+90x^101+45x^102+26x^103+14x^104+8x^105+9x^106+8x^107+2x^108+2x^110

The gray image is a code over GF(2) with n=728, k=15 and d=336.
This code was found by Heurico 1.16 in 15.3 seconds.