arithmetric sequence?

A square ABCD divided into 16 small square numbered from 1to16.
Coins are to be placed in the small squares in the following way:
One coin is placed in square NO.1,two coins in NO.2,four coin in NO.3,
eight coin in NO.4,sixteen in NO.5,2^(n-1) in NO.n.
Number of coins in any square is twice that in the preceding square
The total number of coins placed in all the 16 squares be N.N=65535