n = int(input()) x,y =0 ,n-1 a =[[0]*n for x in range(n)] i = 1 dirs = [(1,0),(0,-1),(-1,0),(0,1)] a[x][y] = i while i<n**2: for d in dirs: x, y = x + d[0], y + d[1] while 0<=x<n and 0<=y<n and a[x][y]==0: i +=1 # Next Cell a[x][y] = i x,y = x + d[0], y + d[1] x,y = x-d[0],y-d[1] for row in a: print(*row)