Return an xmas tree n
rows in length.
n
will always be greater than 0.
Examples:
Return the first N items of the Fibonacci sequence.
The input will be a whole number greater than or equal to zero.
The output should be iterable.
Winner: Joaquín Ferrero (joaquinferrero) - Perl - 40
Runner Up: Abhishek Chanda (achanda) - Python - 51