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

generates a code of length 75 over Z49 who´s minimum homogenous weight is 413.

Homogenous weight enumerator: w(x)=1x^0+666x^413+1296x^420+1512x^427+1872x^434+1656x^441+1902x^448+100842x^450+1830x^455+1872x^462+1674x^469+1038x^476+690x^483+540x^490+210x^497+36x^504+6x^511+6x^525

The gray image is a code over GF(7) with n=525, k=6 and d=413.
This code was found by Heurico 1.16 in 21.5 seconds.