Let \(T\) be the nonnegative integer sequence defined by
\[T_0 = 0 \\
T_1 = 1 \\
T_2 = 1 \\
T_n = T_{n-1} + T_{n-2} +\ T_{n-3},\ n \geq 3\]
Also let
\[Q = \lim_{n\to\infty}\frac{T_n}{T_{n-1}}\]
Find the value of
\[Q^3 - Q^2 - Q\]

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