Write a program in Java to find the sum of the given series:

1 + 4 + 9 + …… + 400

public class KboatSeries
{
    public static void main(String args[]) {
        int sum = 0;
        for (int i = 1; i <= 20; i++)
            sum += (i*i);
        System.out.println("Sum = " + sum);
    }
}