public function getRow($n)
{
if ($n == 1) {
return new Row(array(1));
}
$thePreviousRow = $this->getRow($n - 1);
$theRow = new Row();
for ($i = 0; $i < $n; $i++) {
$theRow->set($i, $thePreviousRow->get($i - 1) + $thePreviousRow->get($i));
}
return $theRow;
}
