Sum of Series||C language||programming_info ||Series problem 9

To calculate sum of the first N terms of the series:

2,10,30,68....

Solution using C language:

#include <stdio.h>

int main() {

   int n ;

   printf("Enter the range of the series\n");

   scanf("%d",&n);

   int sum = (n*(n + 1)/2) + (n*(n+1)/2)(n(n+1)/2);

   printf("the sum of series till %d is %d", n,sum);

   return 0;

} 

Output:

Enter the range of the series

6

the sum of series till 6 is 462

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