#include 
#include 
#include 
#include 
using namespace std;
int n;
int mat[21][21];
long long dp[1 << 20];
long long rec(int red, int bitmask) {
    if(__builtin_popcount(bitmask) == n) {
        return 1;
    }
    if(dp[bitmask] != -1) {
        return dp[bitmask];
    }
    long long result = 0;
    for(int i = 0; i < n; i++) {
        if(mat[red][i] == 1) {
            if((bitmask & (1 << i)) == 0) {
                int new_mask = (bitmask | (1 << i));
                result += rec(red + 1, new_mask);
            }
        }
    }
    return dp[bitmask] = result;
}
int main()
{
    ios_base::sync_with_stdio(0);
    int t;
    cin >> t;
    while(t--) {
        cin >> n;
        for(int i = 0; i < n; i++){
            for(int j =0 ; j < n; j++) {
                cin >> mat[i][j];
            }
        }
        memset(dp, -1, sizeof dp);
        cout << rec(0, 0) << endl;
    }
    return 0;
}