"""

Pascal's triangle is a triangular array of numbers in which those at the ends of the rows are 1 and each of the others is the sum of the nearest two numbers in the row above (the apex, 1, being at the top).

"""

print("Welcome to Pascal's traingle:")

n=int(input("Enter number of rows for the pascal's traingle: "))

a=[]

for i in range(n):

a.append([])

a[i].append(1)

for j in range(1,i):

a[i].append(a[i-1][j-1]+a[i-1][j])

if(n!=0):

a[i].append(1)

# printing pascal's triangle

print( " Your Pascal's traiange for the number {}".format(n))

for i in range(n):

print(" "*(n-i),end=" ",sep=" ")

for j in range(0,i+1):

print('{0:6}'.format(a[i][j]),end=" ",sep=" ")

print()