The generator matrix

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

generates a code of length 58 over Z49 who´s minimum homogenous weight is 335.

Homogenous weight enumerator: w(x)=1x^0+9702x^335+2646x^336+28518x^342+4164x^343+29106x^349+5292x^350+33516x^356+4704x^357

The gray image is a code over GF(7) with n=406, k=6 and d=335.
This code was found by Heurico 1.16 in 4.67 seconds.