Pascal's triangle was a challenge on a forum I frequent today and this is what I came up with:

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 | ```
def pascals_triangle(n):
'''
Pascal's triangle:
for x in pascals_triangle(5):
print('{0:^16}'.format(x))
[1]
[1, 1]
[1, 2, 1]
[1, 3, 3, 1]
[1, 4, 6, 4, 1]
'''
x=[[1]]
for i in range(n-1):
x.append([sum(i) for i in zip([0]+x[-1],x[-1]+[0])])
return x
``` |

Even better:

The second doesn't even look triangular :-)

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for sure it works just for ´n<6´ since it would cut the ´10´ to ´1, 0´ etc.