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

generates a code of length 41 over Z49 who´s minimum homogenous weight is 210.

Homogenous weight enumerator: w(x)=1x^0+180x^210+924x^217+1434x^224+294x^228+1776x^231+5292x^235+2088x^238+31752x^242+2538x^245+63504x^249+2784x^252+2310x^259+1734x^266+846x^273+168x^280+24x^287

The gray image is a code over GF(7) with n=287, k=6 and d=210.
This code was found by Heurico 1.16 in 8.29 seconds.