dxy = [(1,0),(0,1),(-1,0),(0,-1)]
N = int(raw_input())
assert 1 <= N <= 30
whirlnumber = [[True]*(N+2) for i in xrange(N+2)]
for i in xrange(N*N):
	whirlnumber[i/N+1][i%N+1] = False
x = y = 1
di = 0
for i in xrange(N**2):
	whirlnumber[y][x] = "%03d" % (i+1)
	nx = x+dxy[di][0]
	ny = y+dxy[di][1]
	if whirlnumber[ny][nx]:
		di = (di + 1) % 4
		nx = x+dxy[di][0]
		ny = y+dxy[di][1]
	x,y = nx,ny
for i in xrange(1,N+1):
	print " ".join(whirlnumber[i][1:N+1])