Pascal's Triangle in Python 3.

Pascal's Triangle.py

row = int(input("Enter number of rows: "))
space = 36
a = [0] * 20 
print("\n\t\t\t\t  PASCAL'S TRIANGLE\n")
for i in range(row):
    for spi in range(1,space+1):
        print(" ", end="")
    a[i] = 1
    for j in range(i+1):
        print('%6d' %(a[j]), end = "")
    for j in range(i,0,-1):
        a[j] = a[j] + a[j-1]
    space = space - 3
    print()