n = int(input())
lis = [[0,1],[1,0],[0,-1],[-1,0]]

d = [[0 for i in range(n)] for j in range(n)]

def f(x):
    t = str(x)
    ret = "0"*(3-len(t)) + t
    return ret


p = 0
x,y = 0,0
for i in range(n**2):
    d[x][y] = f(i+1)

    xx = x + lis[p%4][0]
    yy = y + lis[p%4][1]
    if xx == -1 or xx == n or yy == -1 or yy == n:
        p += 1
    elif d[xx][yy] != 0:
        p += 1
    x += lis[p%4][0]
    y += lis[p%4][1]


for i in range(n):
    print(*d[i])