Problem 55990. Next Tribonacci Number

• Created by Ben Placek

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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.

The first 10 Tribonacci numbers are: 0, 1, 1, 2, 4, 7, 13, 24, 44, 81.

Given a value N, find the smallest Tribonacci number greater than N. You can assume N is a positive integer.

For example, if N = 42, your function should return 44. If N = 17, your function should return 24.

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56.5% Correct | 43.5% Incorrect

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Last Solution submitted on Apr 05, 2025

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