zigzag

n = int(input())

a = [[0 for i in range(n)] for j in range(n)]
i = 0
j = 0
x = 1
k = 0

while x <= n*n:
    a[i][j] = x

    if i != j:
        a[j][i] = (a[k][k] + (n-k*2)*2) * 2 - 4 - x

    if j != n-k-1:
        j += 1

    elif i != n-k-1:
        i += 1

    elif x != n*n:
        k += 1
        i = j = k
        x = a[k][k-1]

    x += 1


for i in range(n):
    for j in range(n):
        print(a[i][j], end = ' ')
    print()