Moved to the bar, because this is not a Python question.
They're ellipses, implying that there is more in between but that the pattern should be recognizable. So the whole thing is the product of all the parts with denominators (k, k-1, k-2, k-3, ..., 3, 2, 1) and the numerator has its own pattern.
Join the #python-forum IRC channel on irc.freenode.net!
Please do not PM members regarding questions which are meant to be discussed publicly. The point of the forum is so that others can benefit from it. We don't want to help you over PMs or emails.