move = [[0, 1], [1, 0], [0, -1], [-1, 0]]
N = int(raw_input())
board = []
for i in range(0, N):
	lst = []
	for j in range(0, N):
		lst.append(0)
	board.append(lst)
now = [0, 0]
index = 1
flag = 0
while index <= N*N:
	board[now[0]][now[1]] = index
	nextx = now[0]+move[flag][0]
	nexty = now[1]+move[flag][1]
	if nextx<0 or N-1<nextx or nexty<0 or N-1<nexty or board[nextx][nexty] != 0:
		flag = (flag+1)%4
		nextx = now[0]+move[flag][0]
		nexty = now[1]+move[flag][1]
	now = [nextx, nexty]
	index += 1

for i in range(0, N):
	s = ''
	for j in range(0, N):
		if len(str(board[i][j])) == 1: s = s + '00'
		elif len(str(board[i][j])) == 2: s = s + '0'
		s = s + str(board[i][j])
		if j != N-1: s = s + ' '
	print s