N = int(input())
X = [1,0,-1,0]
Y = [0,1,0,-1]
MAP = [['0'.zfill(3)] * N for i in range(N)]
cnt = 1
x = 0
y = 0
di = 0
while cnt <= N**2:
    MAP[y][x]=str(cnt).zfill(3)
    if x + X[di] <0 or x+X[di]>=N or y+Y[di]<0 or y+Y[di]>=N or MAP[y+Y[di]][x+X[di]]!='000':
        di = (di +1)%4
    x += X[di]
    y += Y[di]
    cnt += 1

for i in range(N):
    print(*MAP[i])