The generator matrix

 1  0  0  1  1  1  1  1  1  1  1  1  1  1  2  1  1  1  1 2a+2 2a  1  1  1  1 2a  1  1  1  1  1  2  1  1  1  1  1  0  1  1  0 2a+2  1 2a+2  2  1  1 2a  0  1  1  1  1  1  1  1  1  1  1  1  1  1  1
 0  1  0 2a+2 2a  2  1 3a+2 3a+3 2a+3 2a+1  3  a a+3  1 3a a+2 3a+1 a+1  1  1  0  1  a 3a+3  1 2a  2 a+3 2a+3 a+2  1 2a+2 2a+1  3 a+1 3a+1  1 3a 2a+1  1  1 3a+2  1  1  1  3  1  0  2  0 2a 2a+2 3a  a 3a+2  2  0 2a+3 2a+2 a+3 a+1 3a+1
 0  0  1  1  a 3a+3 3a+1 a+1 a+3 a+2 2a+1  2 2a+2 2a a+1  3 3a+2 3a 2a+3 2a+1 3a  2 3a+3  0 3a+1 3a+2 3a+2 a+3 2a+2  a a+2 a+3 2a+3  1 2a+2  3 3a+2 3a+1  1 a+2 2a+2  3 3a+3 a+3 3a  a 3a+1  0  1 2a  a 2a+3 a+1 3a+2  a 2a  2  1 2a+2 2a 2a+3 a+2  0

generates a code of length 63 over GR(16,4) who´s minimum homogenous weight is 182.

Homogenous weight enumerator: w(x)=1x^0+552x^182+540x^183+84x^184+744x^186+384x^187+84x^188+372x^190+228x^191+27x^192+252x^194+180x^195+24x^196+192x^198+96x^199+24x^200+132x^202+108x^203+12x^204+60x^206

The gray image is a code over GF(4) with n=252, k=6 and d=182.
This code was found by Heurico 1.16 in 63.8 seconds.