<P> and, represented with capital - sigma notation as: </P> <Dl> <Dd> ∑ i = 0 63 2 i . (\ displaystyle \ sum _ (i = 0) ^ (63) 2 ^ (i). \,) </Dd> </Dl> <Dd> ∑ i = 0 63 2 i . (\ displaystyle \ sum _ (i = 0) ^ (63) 2 ^ (i). \,) </Dd> <P> It can also be solved much more easily using: </P>

Suppose you place a penny on the first square of a checkerboard