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 14  1  1  1  1  1  1  1 42  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 45 44 13 32 33  1 42 22 24  2 41 39 12  1 28  8 10 37 27

generates a code of length 45 over Z49 who´s minimum homogenous weight is 268.

Homogenous weight enumerator: w(x)=1x^0+630x^268+1260x^269+30x^273+252x^275+210x^276+18x^280

The gray image is a code over GF(7) with n=315, k=4 and d=268.
This code was found by Heurico 1.16 in 0.00967 seconds.