N = int(input())

E = [(1, 0), (0, 1), (-1, 0), (0, -1)]
A = [[0 for __ in range(N)] for _ in range(N)]

h, w = 0, 0
A[h][w], m = 1, 0 

for i in range(2, N*N+1):
    for j in range(m, m+4): 
        x = w + E[j%4][0]
        y = h + E[j%4][1]
        if 0<=x<N and 0<=y<N:
            if  A[y][x] == 0:
                A[y][x] = i 
                m = j
                h, w = y, x
                break
    
for i in range(N):
    for j in range(N):
        print(f"{A[i][j]:03d}", end=' ')    
    print()