The generator matrix

 1  0  1  1  1  1  1  1  1  1  1  1  1  1  1  7  1  1  1  1  1  1  1 21  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 14  1  1 42  1  1  1  1  1  1  1  1
 0  1 36 31 16 48  4 19  7 29 38  9  6 46 26  1 21 43  3 23 20 11 40  1  0 15 45 44 13 32 14 33 22 24  2 41 39 12 42  8 10 37 27 25 47 28  1 17 30 34 18  5 35 36  1 31 16  1  7 29 38  9 21 43  3 23

generates a code of length 66 over Z49 who´s minimum homogenous weight is 392.

Homogenous weight enumerator: w(x)=1x^0+528x^392+210x^394+882x^396+672x^399+84x^401+18x^413+6x^427

The gray image is a code over GF(7) with n=462, k=4 and d=392.
This code was found by Heurico 1.16 in 0.661 seconds.