for 3:

>! `
>! + - - - - - - - - - - - +
>! | m m 3 m m 3 m m 3 m m |
>! | m 3 3 m 3 3 m 3 3 m 3 |
>! | 3 3 3 3 3 3 3 3 3 3 3 |
>! | m m 3 m m 3 m m 3 m m |
>! | m 3 3 m 3 3 m 3 3 m 3 |
>! | 3 3 3 3 3 3 3 3 3 3 3 |
>! | m m 3 m m 3 m m 3 m m |
>! | m 3 3 m 3 3 m 3 3 m 3 |
>! | 3 3 3 3 3 3 3 3 3 3 3 |
>! | m m 3 m m 3 m m 3 m m |
>! | m 3 3 m 3 3 m 3 3 m 3 |
>! + - - - - - - - - - - - +`

for 4:

>! `
>! + - - - - - - - - - - - +
>! | m m 4 m m 4 m m 4 m m |
>! | m m 4 m m 4 m m 4 m m |
>! | 4 4 4 4 4 4 4 4 4 4 4 |
>! | m m 4 m m 4 m m 4 m m |
>! | m m 4 m m 4 m m 4 m m |
>! | 4 4 4 4 4 4 4 4 4 4 4 |
>! | m m 4 m m 4 m m 4 m m |
>! | m m 4 m m 4 m m 4 m m |
>! | 4 4 4 4 4 4 4 4 4 4 4 |
>! | m m 4 m m 4 m m 4 m m |
>! | m m 4 m m 4 m m 4 m m |
>! + - - - - - - - - - - - +`

For 6:

>! `
>! m m m m
>! m 6 6 m
>! m 6 m m
>! m m m m`