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

generates a code of length 63 over Z49 who´s minimum homogenous weight is 373.

Homogenous weight enumerator: w(x)=1x^0+378x^373+252x^377+906x^378+756x^380+42x^384+42x^387+18x^392+6x^399

The gray image is a code over GF(7) with n=441, k=4 and d=373.
This code was found by Heurico 1.16 in 1.32 seconds.