#include<iostream>
#include<cstdio>
using namespace std;
int n,num=1,zong,heng;
int f[41][41];
int main(){
    scanf("%d",&n);
    heng=n/2+1;
    zong=1;
    while(num<=n*n){
    f[heng][zong]=num;
    if(f[heng+1][zong-1]||((heng+1>n)&&(zong-1==0)))zong++;
    else if(heng+1>n)heng=1,zong--;
    else if(zong-1==0)zong=n,heng++;
    else heng++,zong--; 
    num++;
    }
    for(int i=1;i<=n;i++)
    {
        for(int j=1;j<n;j++)
        printf("%d ",f[j][i]);
        printf("%d\n",f[n][i]);
    }
    return 0;
}