n = int(input()) a = [[0 for _ in range(n)]for _ in range(n)] for i in range(n): for j in range(n): a[i][j] = 1 + min(i, j, n - 1 - i, n - 1 - j) for i in range(n): for j in range(n): print(a[i][j], end = " ") print()