The generator matrix

 1  0  0  0  0  1  1  1  1  1  2  0  1  2  1  1  1  0  0  2
 0  1  0  0  0  0  1  2  1  5  1  1  5  1  0  6  7  1  1  1
 0  0  1  0  0  0  2  1  3  1  3  1  0  1  2  1  3  6  4  1
 0  0  0  1  0  1  0  2  3  1  3  5  5  0  2  7  2  3  0  2
 0  0  0  0  1  1  5  1  2  3  1  2  0  1  1  2  4  5  3  6
 0  0  0  0  0  2  2  2  4  6  0  2  4  4  0  0  6  0  4  2

generates a code of length 20 over Z8 who´s minimum homogenous weight is 13.

Homogenous weight enumerator: w(x)=1x^0+174x^13+705x^14+2104x^15+4737x^16+9176x^17+15289x^18+21432x^19+23906x^20+21012x^21+15649x^22+9448x^23+4562x^24+2008x^25+639x^26+168x^27+42x^28+14x^29+6x^30

The gray image is a code over GF(2) with n=80, k=17 and d=26.
This code was found by Heurico 1.11 in 34.8 seconds.