class Pell 
{
    public static void main(String[] args) 
    {
        long i, f = 1, s = 0, t;
        System.out.println("The Pell Series is: \n");
        for (i = 1; i <= 50; i++) 
        {
            t = f + 2 * s;
            System.out.print(t + "\n");
            f = s;
            s = t;
        }
    }
}