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c = 2
n = int(input())
l = [[0 for _ in range(n)] for _ in range(n)]
i = 0
j = 0
l[i][j] = 1
while True :
    if j+1 < n and l[i][j+1] == 0 :
        for i in range(n-1) :
            l[i][j+1] = c
            j += 1
            c += 1
    if j-1 >= 0 and l[i][j-1] == 0 :
        for i in range(n-1) :
            l[i][j-1] = c
            j -= 1
            c += 1
    if i+1 < n and l[i+1][j] == 0 :
        for i in range(n-1) :
            l[i+1][j] = c
            i += 1
            c += 1
    if i-1 >= 0 and l[i-1][j] == 0 :
        for i in range(n - 1):
            l[i-1][j] = c
            i -= 1
            c += 1
    if c == n*n :
        break
print(l)