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Language: Triangular Sums
Description 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 Write a program to compute the weighted sum of triangular numbers: W(n) = 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 2145 Source |
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