I have recursion
我有递归
T(1) = 2 ^ k
T(2) = 2 * T(1) - 1
T(3) = 2 * T(2) - 1
T(4) = 2 * T(3) - 2
T(5) = 2 * T(4) - 4
T(6) = 2 * T(5) - 8
T(1) = 2 ^ k
T(2) = I have recursion
我有递归
T(1) = 2 ^ k
T(2) = 2 * T(1) - 1
T(3) = 2 * T(2) - 1
T(4) = 2 * T(3) - 2
T(5) = 2 * T(4) - 4
T(6) = 2 * T(5) - 8
T(1) = 2 ^ k
T(2) =