The generator matrix

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

generates a code of length 67 over GR(16,4) who´s minimum homogenous weight is 181.

Homogenous weight enumerator: w(x)=1x^0+312x^181+756x^182+456x^183+945x^184+2016x^185+2856x^186+1548x^187+3117x^188+5436x^189+5664x^190+3336x^191+5835x^192+9828x^193+10092x^194+5076x^195+9021x^196+14808x^197+14496x^198+6936x^199+12465x^200+17832x^201+17244x^202+8076x^203+13608x^204+17568x^205+15240x^206+6888x^207+9507x^208+12660x^209+9540x^210+3468x^211+3852x^212+4752x^213+3372x^214+1008x^215+867x^216+768x^217+588x^218+72x^219+87x^220+36x^221+24x^222+45x^224+12x^228+9x^232+6x^236+6x^240+9x^244

The gray image is a code over GF(4) with n=268, k=9 and d=181.
This code was found by Heurico 1.16 in 242 seconds.