n=int(input())
xy=[[-1]*n for _ in range(n)]
d=0
y,x=0,0
cnt=1
xy[0][0]=cnt
while d<n**2:
    if d%4==0:
        if 0<=x+1<n and xy[y][x+1]==-1:
            cnt+=1
            xy[y][x+1]=cnt
            x+=1
        else:
            d+=1
    elif d%4==1:
        if 0<=y+1<n and xy[y+1][x]==-1:
            cnt+=1
            xy[y+1][x]=cnt
            y+=1
        else:
            d+=1
    elif d%4==2:
        if 0<=x-1<n and xy[y][x-1]==-1:
            cnt+=1
            xy[y][x-1]=cnt
            x-=1
        else:
            d+=1
    elif d%4==3:
        if 0<=y-1<n and xy[y-1][x]==-1:
            cnt+=1
            xy[y-1][x]=cnt
            y-=1
        else:
            d+=1

for i in range(n):                
    for j in range(n):
        print(f'{xy[i][j]:03d}',end=' ')
    print()