#include <map>
#include <set>
#include <list>
#include <cmath>
#include <ctime>
#include <deque>
#include <queue>
#include <stack>
#include <bitset>
#include <cstdio>
#include <limits>
#include <vector>
#include <cstdlib>
#include <numeric>
#include <sstream>
#include <iostream>
#include <algorithm>
#include <functional> 
#include <iomanip>
#include <unordered_map>
#include <memory.h>
#include <unordered_set>
#include <fstream>
#include <random>

using namespace std;

const long long int MOD = 1e9 + 7;
long long int mypow(long long int x, long long int n)
{
	long long int res = 1;
	while (n > 0)
	{
		if (n % 2 == 1)
		{
			res = ((res % MOD) * (x % MOD) % MOD);
			res %= MOD;
		}
		x = ((x % MOD) * (x % MOD) % MOD);
		x %= MOD;
		n /= 2;
	}
	return res;
}

long long int f[100005];
long long int invf[100005];
int main(void)
{
	cin.tie(0);
	ios::sync_with_stdio(false);

	int N, t;
	vector <long long int> v;

	cin >> N;

	for (int i = 0; i < N; i++)
	{
		cin >> t;
		v.push_back(t);
	}

	f[0] = 1;

	for (int i = 1; i <= 100000; i++)
	{
		f[i] = ((f[i - 1] % MOD) * (i % MOD) % MOD);
		f[i] %= MOD;
	}

	invf[100000] = mypow(f[100000], MOD - 2);
	for (int i = 99999; i >= 0; i--)
	{
		invf[i] = ((invf[i + 1] % MOD) * ((i + 1) % MOD) % MOD);
		invf[i] %= MOD;
	}

	long long int res = 0;

	for (int i = 0; i < N; i++)
	{
		long long int ways = f[N - 1];
		ways = ((ways % MOD) * (invf[i] % MOD) % MOD);
		ways %= MOD;
		ways = ((ways % MOD) * (invf[N - 1 - i] % MOD) % MOD);
		ways %= MOD;
		ways = ((ways % MOD) * (v[i] % MOD) % MOD);
		ways %= MOD;
		res = ((res % MOD) + (ways % MOD) % MOD);
		res %= MOD;
	}

	cout << res << '\n';

	return 0;
}