The generator matrix

 1  0  1  1  1  1  1  1  1  1  1  1  1  1  1  0  1  1  0  1  1
 0  1  1 31 16 48  4 19  0 36 31 16 48  4 19  1 19 16  1 36  0
 0  0 35  0 35  7 35  7 42 14  7 42  0  0 42 14 21 28 28 21  0
 0  0  0  7 28 28 21 42  0 42  7 42 35 28 21 21 42 21 28  0  0

generates a code of length 21 over Z49 who´s minimum homogenous weight is 105.

Homogenous weight enumerator: w(x)=1x^0+126x^105+462x^108+450x^112+882x^114+4788x^115+360x^119+10584x^121+19908x^122+444x^126+31752x^128+46872x^129+492x^133+420x^140+108x^147

The gray image is a code over GF(7) with n=147, k=6 and d=105.
This code was found by Heurico 1.16 in 1.47 seconds.