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

generates a code of length 69 over Z49 who´s minimum homogenous weight is 410.

Homogenous weight enumerator: w(x)=1x^0+630x^410+210x^412+30x^413+588x^414+840x^417+84x^419+12x^434+6x^448

The gray image is a code over GF(7) with n=483, k=4 and d=410.
This code was found by Heurico 1.16 in 6.25 seconds.