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21 lines
542 B
JavaScript
21 lines
542 B
JavaScript
/**
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* @function Tribonacci
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* @description Tribonacci is the sum of previous three tribonacci numbers.
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* @param {Integer} n - The input integer
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* @return {Integer} tribonacci of n.
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* @see [Tribonacci_Numbers](https://www.geeksforgeeks.org/tribonacci-numbers/)
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*/
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const tribonacci = (n) => {
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// creating array to store previous tribonacci numbers
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const dp = new Array(n + 1)
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dp[0] = 0
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dp[1] = 1
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dp[2] = 1
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for (let i = 3; i <= n; i++) {
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dp[i] = dp[i - 1] + dp[i - 2] + dp[i - 3]
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}
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return dp[n]
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}
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export { tribonacci }
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