#include <iostream>
using namespace std;
int main()
{
	short int n, d, k, an;
	bool isCorrect = false;
	do
	{
		cout <<"\This program displays sequence elements\n";
		cout << "\nEnter a value of k and d:\n";
		cin >> k;
		cin >> d;
		isCorrect = true;
		if ((k <= 0) || (d <= 0 ))
		{
			isCorrect = false;
			cout << "\nEnter a value greater than zero\n";
		}
	} while (isCorrect);
    an = 0;
    n = 1;
	while (n <= k)
	{
	    an += an + n * d;
		n++;
		printf(an);
	}
	return 0;
}