@techreport{EkhadKoutschanZeilberger21,
author = {Shalosh B.~Ekhad and Christoph Koutschan and Doron Zeilberger},
title = {There are {EXACTLY} 1493804444499093354916284290188948031229880469556 Ways to Derange a Standard Deck of Cards (ignoring suits) [and many other such useful facts]},
institution = {arXiv},
year = {2021},
number = {2101.10147},
note = {Submitted for publication},
url = {https://sites.math.rutgers.edu/~zeilberg/mamarim/mamarimhtml/multider.html},
}