Dev - C++ - ayuda en sucesiones

#include <iostream>

using namespace std;

int main() {

    int a=2,b=3,c=0;

    int i,n;

    cout << "Numero de terminos: ";

    cin >> n;

    cout << a << " " << b << " " << c << " ";

    for (i=1; i<=n-7; i++) {

        a = a * 2;

        b = b * 3;

        cout << a << " " << b << " " << c << " ";

    }

    cout << endl;

    return 0;

}