#include<bits/stdc++.h> using namespace std; int a[1000][1000]; int main() { int n; while(cin>>n) { int num=1,i,j; int cycle=n/2+1,cy=1;//圈数
while(cy<=cycle) {
for(i=cy,j=cy; j<=n-cy; j++) //上
a[i][j]=num++;
for(j=n-cy+1,i=cy; i<=n-cy; i++) //右
a[i][j]=num++;
for(i=n-cy+1,j=n-cy+1; j>=cy+1; j--)//下
a[i][j]=num++;
for(i=n-cy+1,j=cy; i>=cy+1; i--)//左
a[i][j]=num++;
cy++;
}
if(n%2==1)
a[cycle][cycle]=n*n;
for(i=1; i<=n; i++) {
for(j=1; j<=n; j++)
cout<<a[i][j]<<" ";
cout<<endl;
}
}
return 0;
}