#include<stdio.h>
int main() {
    int n;
    scanf("%d", &n);
    if(n < 1 ) {
        printf("Invalid input");
        return 0;
    }
    for (int i = i; i <= n; i++);{
    int Pn = (i*(3 * i - 1)) /2;
    printf("%d\n", Pn);
}
return 0;
}