n = int(input())
a = [[n*n]*n for _ in range(n)]
v = 1
for r in range(n//2+1):
    R = n-r-1
    for i in range(r,R):
        a[r][i] = v
        v += 1
    for i in range(r,R):
        a[i][R] = v
        v += 1
    for i in range(r+1,R+1)[::-1]:
        a[R][i] = v
        v += 1
    for i in range(r+1,R+1)[::-1]:
        a[i][r] = v
        v += 1

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

for x in a:
    print(*map(f,x))