The generator matrix

 1  1  1  1  1  1  1  1  1  1  3  1  1  1  1
 0  3  0  0  0  0  3  6  6  0  3  0  3  3  6
 0  0  3  0  0  3  6  0  6  0  3  3  6  0  6
 0  0  0  3  0  6  6  3  0  3  3  6  3  6  3
 0  0  0  0  3  6  6  6  6  6  6  0  0  6  6

generates a code of length 15 over Z9 who´s minimum homogenous weight is 24.

Homogenous weight enumerator: w(x)=1x^0+60x^24+40x^27+162x^28+62x^30+324x^31+20x^33+40x^36+10x^39+10x^42

The gray image is a code over GF(3) with n=45, k=6 and d=24.
This code was found by Heurico 1.16 in 0.0279 seconds.