#include<stdio.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; i < size; j++){
            int top = i;
            int left = j;
            int bottom = size - 1 - i;
            int right = size - 1 -j;
            int minDist = top;
            if (left < minDist) minDist = left;
            if (bottom < minDist) minDist = bottom;
            if (right < minDist) minDist = right;
            printf("%d", n - minDist);
        }
        printf("\n");
    }
    return 0;
}