#include <stdio.h>
#define min(a, b) ((a) < (b) ? (a) : (b))
int main()
{
int n;
scanf("%d", &n);
int len = n * 2 - 1;
for(int i = 0; i < len; i++)
{
for(int j = 0; j < len; j++)
{
int m = min(i, j);
m = min(m, len - i - 1);
m = min(m, len - j - 1);
printf("%d ", n - m);
}
printf("\n");
}
return 0;
}
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