#include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #pragma warning(disable:4996) //#define ATCODER #ifdef ATCODER #include #endif typedef long long ll; typedef unsigned long long ull; #define LINF 9223300000000000000 #define LINF2 1223300000000000000 #define LINF3 1000000000000 #define INF 2140000000 const long long MOD = 1000000007; //const long long MOD = 998244353; using namespace std; #ifdef ATCODER using namespace atcoder; #endif ll mpow(ll x, ll n) { //x^n(mod M) ll ans = 1; while (n != 0) { if (n & 1) ans = ans * x % MOD; x = x * x % MOD; n = n >> 1; } return ans; } ll minv(ll x) { return mpow(x, MOD - 2); } void solve() { ll n; scanf("%lld", &n); if (n == 0) { printf("1\n"); } else if (n == 1) { printf("12\n"); } else if (n == 2) { printf("65\n"); } else if(n%2) { ll ans0 = ((3 * n + 1) % MOD)*((3 * n) % MOD)%MOD*minv(2) % MOD; ll ans1 = ((n + 1) / 2) * ((n - 1) / 2) % MOD; ll ans = (ans0 - ans1 + MOD) * 4 % MOD; printf("%lld\n", ans); } else { ll ans0 = ((3 * n / 2 + 1) % MOD)*((3 * n / 2 + 1) % MOD) % MOD; ll ans1 = ((3 * n / 2) % MOD)*((3 * n / 2) % MOD) % MOD; ll ans2 = (n / 2) * (n / 2) % MOD; ll ans3 = (n * 3 / 2 + 1) % MOD; ll ans = ((ans0 + ans1- ans2 - ans3+ MOD*2) * 4 + 1) % MOD; printf("%lld\n", ans); } return; } int main() { #if 1 solve(); #else int T, t; scanf("%d", &T); for (t = 0; t < T; t++) { printf("Case #%d: ", t + 1); solve(); } #endif return 0; }