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Fibonacci, tribonacci and other similar sequences
Suppose my Tribonacci series is like this: \begin{equation} T(n) = T(n-1) + T(n-2) +T(n-3) \end{equation} with initial values $T(0) = 1, T(1) = 2$ and $T(2) = 3$, then how do I find $T(10000)$?