def spiral_from_center(n):
    # створюємо матрицю нулями
    matrix = [[0 for _ in range(n)] for _ in range(n)]
 
    # координати центру
    x = y = n // 2
    num = 1
    matrix[y][x] = num
 
    # напрямки (вправо, вниз, вліво, вгору)
    directions = [(0, 1), (1, 0), (0, -1), (-1, 0)]
    step = 1
 
    while num < n * n:
        for i, (dx, dy) in enumerate(directions):
            for _ in range(step):
                if num >= n * n:
                    break
                x += dx
                y += dy
                num += 1
                if 0 <= x < n and 0 <= y < n:
                    matrix[x][y] = num
            if i % 2 == 1:
                step += 1
 
    return matrix
 
 
# --- головна програма ---
n = 17
matrix = spiral_from_center(n)
 
# гарне виведення квадратом
for row in matrix:
    print(" ".join(f"{x:3}" for x in row))
 

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