n = int(input("Enter a number: "))
for i in range(1, n):
    for j in range(1, n-i):
        print(" ", end=" ")
    for k in range(1, 2*i):
        print(i, end=" ")
    print()
for i in range(n-2, 0, -1):
    for j in range(n-1, i, -1):
        print(" ", end=' ')
    for k in range(1, 2*i):
        print(i, end=' ')
    print()

# Coded By DHIRAJ SHELKE