The generator matrix

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

generates a code of length 21 over Z49 who´s minimum homogenous weight is 98.

Homogenous weight enumerator: w(x)=1x^0+258x^98+1170x^105+1656x^112+2688x^119+104940x^126+3870x^133+2508x^140+558x^147

The gray image is a code over GF(7) with n=147, k=6 and d=98.
This code was found by Heurico 1.16 in 3.42 seconds.