I am sure about your interest with combinations. Why not put yourself into a test to see your flair? So here is the problem: You are given an integer n(less than 999). You have to evaluate the expression given at right. Hope to see you successful with this. You should count any term as zero which has k < j. Input The first line of input is an integer t(< 2000). Then follows t lines each of which contain n as described before. Output There should be one line of output for each input which will be the value of the above expression for the corresponding n. Sample Input 2 3 4 Sample Output 7 14