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  1  1  1  1  1  1  1  1  1  1 21  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 19 47  6 36 13 47 24 16  4 48 19 39 18 11 46 32 37  4  1 24  1 35 45
 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 12 46  5 41 30  7 16  9 28 17 29 43  4  6  2 40 36 31 14 46 37 30  8

generates a code of length 59 over Z49 who´s minimum homogenous weight is 341.

Homogenous weight enumerator: w(x)=1x^0+8316x^341+4578x^342+426x^343+24444x^348+7434x^349+630x^350+24948x^355+8442x^356+840x^357+28728x^362+8358x^363+504x^364

The gray image is a code over GF(7) with n=413, k=6 and d=341.
This code was found by Heurico 1.16 in 11.2 seconds.