The generator matrix

 1  0  1  1  1  1  1  1  1  1  1  1  1  1  1  0  1  1  1  1  1  1  1  1  0  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1
 0  1  1  a 7a+7 8a+4 3a+5 8a+5 8a a+5  0 a+5 8a 8a+5 8a+4  1  a 7a+7 3a+7 3a+5 a+5 8a+5 7a+7 8a+4  1  a 3a+7 2a+5 3a+7 8a+7 a+7  0 8a 2a+5 a+8  3 8a+3 5a+5 8a+7 a+8 3a 5a+7 4a+8 2a 2a+2 2a+3 6a+7 7a+8 5a+6 a+3 3a+5 6a+7 a+3 2a+5 7a 4a+8 8a+5 a+3 5a+7 a+5 8a+1 5a+6 2a+4  0
 0  0 3a+6  0 3a+6  3 6a+6 6a+6  6 3a 3a+6 3a  3 3a  3  3 6a+6  6 3a+6 3a+3 6a+6  6  0 3a  6  6  3 3a 6a 6a+3 6a 6a+3 6a+6 3a+3  6 6a+3 3a+6 3a+6  6 6a+3  0 6a+3 6a+3  0 6a+6  3  6  6  0 6a 3a+6 6a+6 3a 6a 3a+6 3a 6a 3a+3 3a+3 6a+3 3a+6 6a  3  0
 0  0  0  3 3a+6 3a+6  3 3a  3 3a+3 6a 6a+6 6a 6a+3  0 6a+6 3a+3 3a+6 3a 3a+3 6a 3a 6a+6  6  0 3a+3 3a  0 6a+6 3a+6  3 6a 6a+6 3a 6a  6  3 6a+3  0  3 6a+6 6a+6 3a 3a+3  6  3 3a+3  0 3a  0 3a+3  6 6a+6 6a+3 6a+6 3a 3a+3  0 6a  6 6a+3 6a 6a  0

generates a code of length 64 over GR(81,9) who´s minimum homogenous weight is 477.

Homogenous weight enumerator: w(x)=1x^0+216x^477+432x^482+72x^483+216x^484+1296x^485+984x^486+144x^488+288x^489+3312x^491+2160x^492+2880x^493+11880x^494+1096x^495+3456x^497+3024x^498+12096x^500+6696x^501+8208x^502+26568x^503+912x^504+27648x^506+16416x^507+34128x^509+20664x^510+20736x^511+63504x^512+984x^513+73728x^515+32760x^516+55008x^518+22896x^519+20448x^520+54216x^521+720x^522+576x^531+384x^540+336x^549+240x^558+104x^567+8x^576

The gray image is a code over GF(9) with n=576, k=6 and d=477.
This code was found by Heurico 1.16 in 37.1 seconds.