#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
constexpr ll MOD = 1e9 + 7;
#define pb push_back
string add(string x, string y)
{
int carry = 0;
int sx = static_cast<int>(x.size());
int sy = static_cast<int>(y.size());
if(sx > sy)
{
swap(x,y);
swap(sx,sy);
}
if(sx < sy)
{
for(int i = sx; i < sy; ++i)
x.pb('0');
}
string s = "";
for(int i = 0; i < sy; ++i)
{
int a = x[i]-48;
int b = y[i]-48;
s.pb(static_cast<char>((a+b+carry)%10 + 48));
carry = (a+b+carry)/10;
}
if(carry != 0)
s.pb(static_cast<char>(carry + 48));
//cout << x << "+" << y << "=" << s;
return s;
}
int main()
{
ios_base::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
int n;
cin >> n;
vector<vector<int>> v(n,vector<int>(n));
vector<vector<string>> dp(n,vector<string>(n,"0"));
for(int i = 0; i < n; ++i)
{
for(int j = 0; j < n; ++j)
cin >> v[i][j];
}
dp[0][0] = "1";
for(int i = 0; i < n; ++i)
{
for(int j = 0; j < n; ++j)
{
if(v[i][j] == 0)
continue;
if(i+v[i][j] < n)
dp[i+v[i][j]][j] = add(dp[i][j],dp[i+v[i][j]][j]);
if(j+v[i][j] < n)
dp[i][j+v[i][j]] = add(dp[i][j],dp[i][j+v[i][j]]);
}
}
/*for(int i = 0; i < n; ++i)
{
for(int j = 0; j < n; ++j)
cout << dp[i][j] << " ";
cout << '\n';
}*/
cout << dp[n-1][n-1] << '\n';
return 0;
}
