The generator matrix

 1  1  1  1  1  1  1  1  1  1  2  1  1  1  1  1  1  2  1  1  1
 0  4  0  0  0  0  0  4  0  4  4  0  0  4  0  4  4  4  0  0  0
 0  0  4  0  0  0  4  4  0  4  0  0  4  4  4  4  0  0  0  0  0
 0  0  0  4  0  0  4  0  0  4  4  4  4  0  0  4  0  4  0  0  0
 0  0  0  0  4  0  4  0  4  4  0  4  0  4  0  4  4  0  0  0  0
 0  0  0  0  0  4  4  0  4  0  4  0  0  4  4  4  0  4  0  0  0

generates a code of length 21 over Z8 who´s minimum homogenous weight is 16.

Homogenous weight enumerator: w(x)=1x^0+25x^16+32x^19+128x^21+21x^22+32x^23+6x^24+10x^30+1x^38

The gray image is a code over GF(2) with n=84, k=8 and d=32.
This code was found by Heurico 1.16 in 0.0027 seconds.