Summation of a series

//series: 2 + 6 + 12 + 20 + 30 + 42 + 56 + 72 + 90 +....

#include<stdio.h>

int main()
{
    int n;
    scanf("%d", &n);

    int s = 0, sum = 0, i, j;
    for(i = 2, j = 0; i <= n; i++, j++)
    {
        s += i + j;
        sum += s;
        printf("%d ", s);
    }
    printf("\nsum %d ", sum);
}