#include<stdio.h>
#include<string.h>
#define maxn 10 
int a[maxn][maxn];
int main()
{
    memset(a,0,sizeof(a));
    int n;scanf("%d",&n);
    int x=0,y=n-1;
    int num=1;
    a[x][y]=num;
    while(num<n*n){
        while(x+1<n&&a[x+1][y]==0) a[++x][y]=++num;
        while(y-1>=0&&a[x][y-1]==0) a[x][--y]=++num;
        while(x-1>=0&&a[x-1][y]==0) a[--x][y]=++num;
        while(y+1<n&&a[x][y+1]==0) a[x][++y]=++num;
    }
    for(x=0;x<n;x++){
        for(y=0;y<n;y++){
            printf("%3d",a[x][y]);
        }
        printf("\n");
    }
    return 0;
}