#include <stdio.h>

int main ()
{
  int n, i, j;

  printf("Enter Positive Number for Outermost Boundary [1-99]: ");
  scanf("%d", &n);

  for ( i = 0; i < n; ++i ) {
    for ( j = n-1; j > i; --j ) printf("   ");
    for ( j = n; j >= n-i; --j ) printf("%3d", j);
    for ( j = n-i+1; j <= n; ++j ) printf("%3d", j);
    printf("\n");
  }
  for ( i = 1; i < n; ++i ) {
    for ( j = 0; j < i; ++j ) printf("   ");
    for ( j = n; j > i; --j ) printf("%3d", j);
    for ( j = i+2; j <= n; ++j ) printf("%3d", j);
    printf("\n");
  }

  return 0;
}