рек - 14 СДАТЬ

#include<iostream>
#include<math.h>
#include<iomanip>
using namespace std;
int main()
{
        float a1 = 2, a2 = 1, a;
        int n;
        cin >> n;
			if (n == 1)
			{cout<<"a1="<<a1<<endl;}
if (n == 2)
	{cout<<"a1="<<a1<<endl<<"a2="<<a2<<endl;}

if (n>=3)
	{{cout<<"a1=2"<<endl<<"a2=1"<<endl;}
		for (int i = 3; i <= n; i++)
{
                a=(((2.0/3.0)*a1)-((1.0/3.0)*(pow(a2,2))));
                                a1=a2; a2=a;
								cout<<setprecision(10)<<"a"<<i<<"="<<a<<endl;}}
		system("pause");
        return 0;
}