Problem 55985. Generate Tribonacci Sequence
The "Tribonacci" sequence is an extension of the idea of the Fibonacci sequence:
That is, each new term is the sum of the three previous terms.
If the sequence starts with 0, 1, 1, the first 10 Tribonacci numbers are: 0, 1, 1, 2, 4, 7, 13, 24, 44, 81.
If the sequence instead starts with 2, 3, 7, the first 15 Tribonacci numbers are: 2, 3, 7, 12, 22, 41, 75, 138, 254, 467, 859, 1580, 2906, 5345, 9831.
Given a vector of three numbers, Tstart, and an integer n (> 3), return an n-element row vector of the first n Tribonacci numbers starting with Tstart.
T = tribo([2 3 7],15)
T =
2 3 7 12 22 41 75 138 254 467 859 1580 2906 5345 9831
Solution Stats
Problem Comments
-
2 Comments
Marco Riani
on 15 Mar 2023
I think it is important to specify that the output must be a row vector
Matt Tearle
on 23 Feb 2024
Thanks, Marco. Added that.
Solution Comments
Show commentsProblem Recent Solvers99
Suggested Problems
-
1863 Solvers
-
Get the elements of diagonal and antidiagonal for any m-by-n matrix
470 Solvers
-
Calculate the Number of Sign Changes in a Row Vector (No Element Is Zero)
620 Solvers
-
299 Solvers
-
Approximation of Pi (vector inputs)
197 Solvers
More from this Author12
Problem Tags
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!