#include<iostream>

 #include<cstdio>

 #include<cstring>

 #define M 50

 using namespace std;

 int a[M][M]={};

 int main(){

     freopen("magic.in","r",stdin);

     freopen("magic.out","w",stdout);

     int n; cin>>n;

     int lastx=,lasty=+(n>>); a[lastx][lasty]=;

     for(int i=;i<=n*n;i++){

         if(lastx==&&lasty!=n){a[lastx=n][++lasty]=i; continue;}

         if(lastx!=&&lasty==n){a[--lastx][lasty=]=i; continue;}

         if(lastx==&&lasty==n){a[++lastx][lasty]=i; continue;}

         if(lastx!=&&lasty!=n){

             if(a[lastx-][lasty+]==)

             a[--lastx][++lasty]=i;

             else a[++lastx][lasty]=i;

             continue;

         }

     }

     for(int i=;i<=n;i++){

         for(int j=;j<=n;j++) printf("%d ",a[i][j]);

         printf("\n");

     }

 }