#python 3

def pascaltriangle(length):
    l = [1]
    yield l
    for i in range(length-1):
        nl = [1]
        for j in range(len(l)-1):
            nl.append(l[j]+l[j+1])
        nl.append(1)
        yield nl
        l = nl

def prettyprint(l,w):
    s = " ".join(map(str,l))
    indent = int((w - len(s))/2)
    s = (indent * " ") + s
    print(s)

length = int(input('Length of pascal triangle: '))

for n in pascaltriangle(length):
    prettyprint(n,length*3)