Recursionmedium
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The Tribonacci sequence is defined by T(n)=T(n1)+T(n2)+T(n3)T(n) = T(n-1) + T(n-2) + T(n-3) with T(0)=0T(0) = 0, T(1)=0T(1) = 0, and T(2)=1T(2) = 1. What is T(6)T(6)?