@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},
}