The Tribonacci sequence Tn is defined as follows: T0 = 0, T1 = 1, T2 = 1, and Tn+3 = Tn + Tn+1 + Tn+2 for n >= 0.Given n, return the value of Tn. Example 1:Input: n = 4Output: 4Explanation:T_3 = 0 + 1 + 1 = 2T_4 = 1 + 1 + 2 = 4Example 2:
Question
The Tribonacci sequence Tn is defined as follows: T0 = 0, T1 = 1, T2 = 1, and Tn+3 = Tn + Tn+1 + Tn+2 for n >= 0.Given n, return the value of Tn. Example 1:Input: n = 4Output: 4Explanation:T_3 = 0 + 1 + 1 = 2T_4 = 1 + 1 + 2 = 4Example 2:
Solution
Sure, I can help with that. Here's a Python function that calculates the nth Tribonacci number:
def tribonacci(n):
if n == 0:
return 0
elif n == 1 or n == 2:
return 1
else:
trib = [0, 1, 1]
for i in range(3, n+1):
trib.append(trib[i-1] + trib[i-2] + trib[i-3])
return trib[n]
Similar Questions
You are given the formula to calculate a tricacci number which is as follows:Ti+1 = Ti + maxDigit(Ti)*minDigit(Tti)Here maxDigit(a) and minDigit(a) are the maximum and minimum digits in the decimal representation of integer a respectively.Given the value of T1 and N, find the value of TN.InputThe first line of the input contains two integers T1 and N.Constraints:1 <= N <= 10181 <= T1 <= 1018OutputPrint the value of TN.ExampleSample Input:1 4Sample Output:42
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