Calculating Tribonacci numbers with new switch expressions in Java 14

Tribonacci.java

public class Tribonacci {

    public static void main(String[] args) {
        for (String arg : args) {
            int n = Integer.valueOf(arg);
            System.out.printf("Tribonacci(%d) = %d%n", n, tribonacci(n));
        }
    }

    static int tribonacci(int n) {
        return switch (n) {
            case 0    -> 0;
            case 1, 2 -> 1;
            default   -> tribonacci(n - 1) + tribonacci(n - 2) + tribonacci(n - 3);
        };
    }
}