A note on the number of derangements.
Sun, Ping
Applied Mathematics E-Notes [electronic only], Tome 5 (2005), p. 176-178 / Harvested from The Electronic Library of Mathematics
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Publié le : 2005-01-01
EUDML-ID : urn:eudml:doc:52367 
@article{05019378,
     title = {A note on the number of derangements.},
     journal = {Applied Mathematics E-Notes [electronic only]},
     volume = {5},
     year = {2005},
     pages = {176-178},
     zbl = {1088.05005},
     language = {en},
     url = {http://dml.mathdoc.fr/item/05019378}
}

Sun, Ping. A note on the number of derangements.. Applied Mathematics E-Notes [electronic only], Tome 5 (2005) pp. 176-178. http://gdmltest.u-ga.fr/item/05019378/