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- #include<iostream>
- #include <math.h>
- using namespace std;
- long long pola(int n) {
- if (n==0)
- return 1;
- long long k;
- k=(2*n+1)*(2*n+1) - pola(n-1);
- return k;
- }
- int main () {
- int T, n;
- cin >> T;
- while (T > 0) {
- T = T - 1;
- cin >> n;
- cout << pola(n) <<"\n";
- }
- return 0;
- }
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