#include 
using namespace std;
int n;
int mat[22][22];
long long dp[1<<20];
long long rec(int visited) {
    if(__builtin_popcount(visited) == n) {
        return 1;
    }
    if(dp[visited] != -1) {
        return dp[visited];
    }
    int at = __builtin_popcount(visited);
    long long combinations = 0;
    for(int j = 0; j< n  ; j++) {
        if(mat[at][j] == 1) {
            if((visited & (1 << j)) == 0) {
                int new_mask = (visited | (1 << j));
                combinations += rec(new_mask);
            }
        }
    }
    return dp[visited] = combinations;
}
int main() {
    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) << endl;
    }
    return 0;
}