#include<bits/stdc++.h>

using namespace std;

int main(){

    int a[11][11];

    int n;

    while(~scanf("%d",&n)){

        memset(a,0,sizeof(a));

        int x,y,tot=0;

        a[x=0][y=0]=tot=1;

        while(tot<n*n){

            while(y+1<n&&!a[x][y+1]) a[x][++y]=++tot;

            while(x+1<n&&!a[x+1][y]) a[++x][y]=++tot;

            while(y-1>=0&&!a[x][y-1]) a[x][--y]=++tot;

            while(x-1>=0&&!a[x-1][y]) a[--x][y]=++tot;

        }

        if(n<=3){

            for(x=0;x<n;x++){

                for(y=0;y<n;y++){

                    if(y==0) printf("%d",a[x][y]);

                    else printf("%2d",a[x][y]);

                }

                printf("\n");

            }

        }

        else if(n==10){

            for(x=0;x<n;x++){

                for(y=0;y<n;y++){

                    if(y==0) printf("%3d",a[x][y]);

                    else printf("%4d",a[x][y]);

                }

                printf("\n");

            }

        }

        else{

            for(x=0;x<n;x++){

                for(y=0;y<n;y++){

                    if(y==0) printf("%2d",a[x][y]);

                    else printf("%3d",a[x][y]);

                }

                printf("\n");

            }

        }

    }

    return 0;

}