#include <stdio.h>
#include <stdlib.h>

int main() {
    int n;
    scanf("%d", &n);
    
    if (n < 0) {
        printf("Invalid Input");
        return 0;
    }
    
    int size = 2 * n - 1;
    
    for (int i = 0; i < size; i++) {
        for (int j = 0; j < size; j++) {
            int top = i;
            int left = j;
            int right = size - 1 - j;
            int bottom = size - 1 - i;
            
            int min = top;
            if (left < min) min = left;
            if ( right < min) min = right;
            if ( bottom < min) min = bottom;
            
            printf("%d", n - min);
        } 
        printf("\n");
}