181997601

Appears in sequences

• Tribonacci numbers: a(n) = a(n-1) + a(n-2) + a(n-3) for n >= 3 with a(0) = a(1) = 0 and a(2) = 1.at n=34A000073
• a(n) = T(3n+1), where T(n) are tribonacci numbers A000073.at n=11A074581
• Sequences A001644 and A000073 interleaved.at n=33A075676
• Bisection of tribonacci numbers.at n=17A099463
• a(n) is the sum of the (1,2)- and (1,3)-entries of the matrix P^n + T^n, where the 3 X 3 matrices P and T are defined by P = [0,1,0; 0,0,1; 1,0,0] and T = [0,1,0; 0,0,1; 1,1,1].at n=33A109523
• a(n) = tribonacci(Fibonacci(n)).at n=9A111425
• Satisfies the tribonacci recurrence: a(n) = a(n-1) + a(n-2) + a(n-3).at n=32A282718