#include<stdio.h>
int main()
{
int   n,m=0,i,j,k;
int  a[10][10];
scanf("%d",&n);
for(k=1;k<=n;k++)
{

 for(j=k,i=k;j<=n-k+1;j++)
{
a[i][j]=m;
m++;
}
for(i=k+1,j=n-k+1;i<=n-k+1;i++)
{
a[i][j]=m;
m++;

}

for(j=n-k,i=n-k+1;j>=k;j--)
{
a[i][j]=m;

m++;

}
for(i=n-k,j=k;i>=k+1;j--)
{
a[i][j]=m;
 m++;
}
printf("\n");
}

for(i=1;i<=n;i++)
{
 for(j=1;j<=n;j++)
 {
printf("%3d",a[i][j]);
}


}



return 0;
}