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 for off-topic chat!
Please prefer not to PM members. The point of the forum is so that anyone can benefit. We don't want to help you over PMs/emails/Skype chats that others can't benefit from