Can't wait for the 3-hyperdimensional arrays to come? Here you go! {10,10[1\₂2]2} can also be written as {10,10[1\_2 2]2}.
Tip: {10,x[1\₂2]2} = {10,10[1¬1...(x times)...1¬1]2} {10,x[1\₃2]2} = {10,10[1\₂...(x times)...1\₂1]2}