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