The generator matrix

 1  0  1  1  1  1  1  1  1  1  1  0  1  1  1  1  1  1  1  1  1  1  1  7  1  1  1  7  1  1  1  1  1  1  1  1  1 35  1  1 35  1  1  1  1  1 14  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1
 0  1  1 31 16 48  4 19  0 36 31  1 16 19 48  4 36  7 38 26  9  6 46  1  9  6 46  1  7 29 38 26 30 18 21 15 45  1  2 18  1 40 20 40 39 12  1 30 21  7 42 21 16  9 19 40 42 12  2 42  2 26  3  1 46  4 39 32
 0  0 35 21 42  7 14 21  7 28 14  7 35  0  0 28 42 14 42 28  7 35  7 35 21 21 35 21 35  7  0 42 28 42 21  0  7 42 14  0 14 14 28  7 21 35 28  0  0 42 28 35 28 35 28  0 21 42 21  7 42 14 42  7 28 42  0  7

generates a code of length 68 over Z49 who´s minimum homogenous weight is 398.

Homogenous weight enumerator: w(x)=1x^0+1722x^398+564x^399+1176x^400+882x^401+3402x^405+678x^406+1176x^407+294x^408+966x^412+1098x^413+1764x^414+882x^415+2142x^419+12x^420+18x^427+18x^434+12x^441

The gray image is a code over GF(7) with n=476, k=5 and d=398.
This code was found by Heurico 1.16 in 0.254 seconds.