The generator matrix

 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  1  1  1  1  7  1  1  1  7  1  1  1  1  1  1  1  1
 0  7  0  0  0  7  7 28  0 21  7 42 14 42  0 28  7 42  7 28 28 35 28 14 14 42 21 42  7  7  0 28  7 42  7 21  0  7 14 14 28  7 42 21 21 35 42  7 28 28
 0  0  7  0  0 35 28 35  7 28 35 35  7  7  7 21 42 21 21 35  0 28  0  0  7  7 14  0 28 35 42  0 35 14 42 35 42 28 14 21 28  7 42 35 21 28 14 42  0 14
 0  0  0  7  0 35 21 21 35 35  7 42  0 14 42 21  7 21 21  7  7  0  7 14 35 42 42 28 42 14 14 14 28 21 42  7 35 14 14 35  7 21 21  7 35 21 28  0 28 42
 0  0  0  0  7 35 42  7 42  7  7  0 14  7  7 42 28  0 28 14 21 35 42 14  7  7 21  0 35  0 35 28 21 35  0 35 35 35  7 42 21 21  7 14 21 14  0  0  7  7

generates a code of length 50 over Z49 who´s minimum homogenous weight is 266.

Homogenous weight enumerator: w(x)=1x^0+498x^266+1146x^273+1686x^280+1962x^287+2058x^288+2196x^294+24696x^295+2256x^301+74088x^302+2316x^308+2082x^315+1572x^322+834x^329+192x^336+60x^343+6x^350

The gray image is a code over GF(7) with n=350, k=6 and d=266.
This code was found by Heurico 1.16 in 10.9 seconds.