Square packing density is pi/4 (~78.54%). The non regular packing approaches a hexagonal packing (pi*sqrt(3)/6 =~ 90.69%) for large N. For N=120 for example d=8

Square packing density is pi/4 (~78.54%). The non regular packing approaches a hexagonal packing (pi*sqrt(3)/6 =~ 90.69%) for large N. For N=120 for example d=85% http://hydra.nat.uni-magdeburg.de/packing/csq/csq120.html http://hydra.nat.uni-magdeburg.de/packing/csq/csq120.html Does not seem practical in reality (39 or more systems instead of one). Maybe for extremely vast fields where you would have many systems anyway.