Ulam

public class Ulam {

    public static void main(String[] args) {

        for (int i = 1; i <= 25; i++) {
            if (i % 2 == 0) {
                System.out.println( i / 2);
            } else {
                System.out.println((i * 3) + 1);
            }
        }
    }
}