Each column represents the digits of the undenary (base 11)
powers of 10.

Above the diagonal (with the black black) are the powers from
10^{1} = A (in base 11)

to 10^{25} =
somereallybignumberinbase11
on the right. Below the diagonal, the order

of the powers is reversed and
different symbols are used.

© 2013 Kerry Mitchell