The generator matrix

 1  0  1  1  1  1  1  1  1  1  1  1  1  1  1  0  1  1  1  1  1  0  1  7  1  7  1  1  1  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  1  1  1  0  1  1  1  1
 0  1  1 31 16 48  4 19  0 36 31 16 48  4 19  1 19 16 48 36 26  1  4  1  0  1 31 38 26  7 36 26  5  7 28 29 19 43  9 38 46  6 47  1  6  9 46 40 20 32 47 16 45  0 15 10  6 14  1  2 22 11  7
 0  0 35  0 35  7 35  7 42 14  7 42  0  0 42 14 21 28 14 21 28  7  7 28 14  7 14 14 35 21 42  0 14 35 35  0 42  0 21 35  0 42 21 14 21 21 14  7 21 28 14 14 21 14 35 21 42  7 42 21 42 14  0
 0  0  0  7 28 28 21 42  0 42  7 42 35 28 21 21 42 21 35 35 35 21  0 28 35 35 28 21 14 42 35  7 42  7 42  0 35 28  7  0 35 28 35 14 21 14  7 28  7 28 14 28 21 42 42  7  7 35  7 42  7  0 21

generates a code of length 63 over Z49 who´s minimum homogenous weight is 357.

Homogenous weight enumerator: w(x)=1x^0+606x^357+168x^358+504x^359+1050x^361+6156x^364+1512x^365+1470x^366+2142x^368+12642x^371+2688x^372+3150x^373+3444x^375+29844x^378+5880x^379+5796x^380+5124x^382+24576x^385+4158x^386+3486x^387+2646x^389+186x^392+126x^399+132x^406+72x^413+48x^420+24x^427+6x^434+12x^441

The gray image is a code over GF(7) with n=441, k=6 and d=357.
This code was found by Heurico 1.16 in 5.67 seconds.