#include <bits/stdc++.h>
using namespace std;
const int M=1000000007;
int n;
int t[101][101];
long long w[101][101];
long long a[101][101];
int main(){
cin >> n;
for (int i=0;i<n;++i){
for (int j=0;j<n;++j){
cin >> t[i][j];
}
}
w[0][0]=1;
for (int i=0;i<n;++i){
for (int j=0;j<n;++j){
if (i) w[i][j]+=w[i-1][j];
if (w[i][j]>M) w[i][j]-=M;
if (j) w[i][j]+=w[i][j-1];
if (w[i][j]>M) w[i][j]-=M;
a[i][j]=t[i][j]*w[i][j]%M;
if (i) a[i][j]+=a[i-1][j];
if (a[i][j]>M) a[i][j]-=M;
if (j) a[i][j]+=a[i][j-1];
if (a[i][j]>M) a[i][j]-=M;
}
}
cout << a[n-1][n-1] << "\n";
}
