4.TribonacciSequence

package MoreExercise;

import java.util.Scanner;

public class TribonacciSequence {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        int num = scanner.nextInt();
        printTribonacciSequence(num);
    }

    // Method to print the Tribonacci sequence up to num terms
    private static void printTribonacciSequence(int num) {
        if (num <= 0) {
            return;
        }

        int[] sequence = new int[num];
        sequence[0] = 1;
        if (num > 1)
            sequence[1] = 1;
        if (num > 2)
            sequence[2] = 2;

        System.out.print(sequence[0]);
        if (num > 1)
            System.out.print(" " + sequence[1]);
        if (num > 2)
            System.out.print(" " + sequence[2]);

        for (int i = 3; i < num; i++) {
            sequence[i] = sequence[i - 1] + sequence[i - 2] + sequence[i - 3];
            System.out.print(" " + sequence[i]);
        }
        System.out.println();
    }
}