Java program to print the first 15 numbers of the Pell series

Write a program to print the first 15 numbers of the Pell series. Pell series is such a series which starts from 1 and 2 , and subsequent numbers is the sum of twice the previous number and the number previous to the previous number. Pell series: 1, 2, 5, 12, 29, 70, 169, 408, 985, 2378, 5741, 13860, …

class Pell
{
	public static void main(Strign arr[])
	{
		int i,f=1,s=0,t;
		for(i=1;i<=15;i++)
		{
			t=f+s*2;
			System.out.print(t);
			f=s;
			s=t;	
		}		
	}
}