The shell
The cells a circle crosses on a design collapse by threes into a rooted tree whose every level holds exactly 2 floor(r / 3^j) + 1 boxes, and the cells the design fills are the leaves whose path never takes a centre seat.
Read: Crop.
The cells a circle crosses on a design collapse by threes into a rooted tree whose every level holds exactly 2 floor(r / 3^j) + 1 boxes, and the cells the design fills are the leaves whose path never takes a centre seat.
Read: Crop.