Write a python program, which asks user to enter value for number of line and then according to input following pattern, should be displayed.

Input:-

n=int(input("Enter number of rows: "))

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)

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()

Output:-