The generator matrix

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

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

Homogenous weight enumerator: w(x)=1x^0+78x^105+444x^112+456x^119+2058x^120+408x^126+12348x^127+510x^133+426x^140+78x^147

The gray image is a code over GF(7) with n=147, k=5 and d=105.
This code was found by Heurico 1.16 in 0.078 seconds.