Write pseudocode for an algorithm?

An old story has a grateful king granting a wish to a favored advisor, and the advisor describing the following process. A chess board is to be brought out, and one grain of rice placed on the first square, two grains on the second, four on the third, and so on, doubling for each square. There are 64 squares on the chessboard. Write pseudocode for an algorithm to determine how many pounds of rice the unlucky king has to give to the advisor, uming 1000 grains per pound.