import sys
def all_nums(n):
    for i in range(1, n+1):
        sys.stdout.write("{} ".format(i))

def all_nums_squared_horizontal(n):
    for i in range(1, n+1):
        sys.stdout.write("{} ".format(i**2))

def all_nums_squared_vertical(n):
    for i in range(1, n+1):
        sys.stdout.write("{}\n".format(i**2))

def all_nums_dividing_by_three(n):
    for i in range(1, n+1):
        if i%3==0:
            sys.stdout.write("{} ".format(i))

def all_nums_not_dividing_by_three(n):
    for i in range(1, n+1):
        if not i%3==0:
            sys.stdout.write("{} ".format(i))

def num_triangle(n):
    for x in range(1, n+1):
        for y in range(1, x+1):
            sys.stdout.write("{} ".format(y))
        sys.stdout.write("\n")

def num_triangle_flipped(n):
    for x in range(1, n+1):
        sys.stdout.write("  "*(n-x))
        for y in range(1, x+1):
            sys.stdout.write("{} ".format(y))
        sys.stdout.write("\n")

def num_triangle_centered(n):
    for x in range(1, n+1):
        sys.stdout.write(" "*(n-x))
        for y in range(1, x+1):
            sys.stdout.write("{} ".format(y))
        sys.stdout.write("\n")

def pascal_triangle(rows):
    ar=[[0, 1, 0]]
    for y in range(1, rows+1):
        ta = [0, 0]
        for x in range(1, len(ar)+1):
            ta.insert(-1, ar[-1][x-1]+ar[-1][x])
        ar.append(ta)
    return ar

sys.stdout.write("Print all numbers from 1 to n\n")
all_nums(5)

sys.stdout.write("\n\nPrint all numbers from 1 to n squared horizontally\n")
all_nums_squared_horizontal(5)

sys.stdout.write("\n\nPrint all numbers from 1 to n squared vertically\n")
all_nums_squared_vertical(5)

sys.stdout.write("\n\nPrint all numbers from 1 to n that divide by 3\n")
all_nums_dividing_by_three(30)

sys.stdout.write("\n\nPrint all numbers from 1 to n that do not divide by 3\n")
all_nums_not_dividing_by_three(30)

sys.stdout.write("\n\nPrint all numbers from 1 to n in a triangle\n")
num_triangle(5)

sys.stdout.write("\n\nPrint all numbers from 1 to n in a triangle flipped\n")
num_triangle_flipped(5)

sys.stdout.write("\n\nPrint all numbers from 1 to n in a triangle centered\n")
num_triangle_centered(5)

sys.stdout.write("\n\nWrite a pascal triangle with n rows\n")
p=pascal_triangle(10)
for x in range(1, len(p)):
    sys.stdout.write(" "*(len(p)-x))
    for y in p[x]:
        sys.stdout.write("{} ".format(y))
    sys.stdout.write("\n")