#include <bits/stdc++.h>
using namespace std;
int main() {
  ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);
  int t;
  cin >> t;
  while (t--) {
    int n;
    cin >> n;
    for (int i = 0; i < n - 1; i++) {
      for (int j = 0; j < n; j++) {
        if (i == j || j == i + 1)
          cout << "1 ";
        else
          cout << "0 ";
      }
      cout << "\n";
    }
    cout << "1 ";
    for (int i = 1; i < n - 1; i++) cout << "0 ";
    cout << "1\n";
  }
  return 0;
}
