This one-liner will calculate the Nth number of the Rth row of Pascal's triangle (removing the N will make a list of the entire row). I was wondering if it should go on the Math One-Liners page, considering the only thing there right now is a primality routine.
Note: The single 1 at the top of Pascal's triangle is considered the 0th row. The first 1 in every row is considered the 0th entry.
EDIT: I just realized that this could be accomplished much more simply by using R nCr N. Not really much of a routine.