Followed by -65, 127, -257, 5 1 1,-1025 ... The law is positive and negative, the number after the negative number is the n power of 2 plus 1, and the number after the positive number is the n power of 2 minus 65438. N = 0, 1, 2 ... Obviously, you can write its general formula, but it is not convenient to enter. Please write it yourself.