#include <bits/stdc++.h>
#define REP(i,n) for(int i = 0; i < (int)(n); ++i)
using namespace std;

int main(){
    int N;
    cin >> N;

    int A[N+2][N+2];
    REP(i,N+2){
        REP(j,N+2){
            A[i][j] = 0;
        }
    }
    REP(i,N+2){
        A[0][i] = 1;
        A[N+1][i] = 1;
        A[i][0] = 1;
        A[i][N+1] = 1;
    }
    int x = 1, y = 1; // place
    int d = 0; // direction: 0 right, 1 down, 2 left, 3 up
    int i = 0;
    for(int i = 1; i <= N*N; i++){
        if(A[y][x]==0){
            A[y][x] = i;
            if(d%4==0) x++;
            else if(d%4==1) y++;
            else if(d%4==2) x--;
            else y--;
        }
        else{
            if(d%4==0) {y++; x--; i--;}
            else if(d%4==1) {y--; x--; i--;}
            else if(d%4==2) {y--; x++; i--;}
            else {y++; x++; i--;}
            d++;
        }
    }
    REP(i,N){
        REP(j,N){
            printf("%03d ", A[i+1][j+1]);
        }
        cout << endl;
    }
    return 0;
}