C :: Triangular Sums
Time Limit: 2 Seconds Memory Limit: 65536 KB
The nth Triangular number, T(n) = 1 + ... + n, is the sum of the first n integers. It is the number of points in a triangular array with n points on side.
For example T(4):
X X X X X X X X X X
Write a program to compute the weighted sum of triangular numbers:
W(n) = SUM[k = 1..n; k*T(k+1)]
Input
The first line of input contains a single integer N, (1 <= N <= 1000) which is the number of datasets that follow.
Each dataset consists of a single line of input containing a single integer n, (1 <= n <= 300), which is the number of points on a side of the triangle.
Output
For each dataset, output on a single line the dataset number, (1 through N), a blank, the value of n for the dataset, a blank, and the weighted sum , W(n), of triangular numbers for n.
Sample Input
4 3 4 5 10
Sample Output
1 3 45 2 4 105 3 5 210 4 10 2145Submit