%0 Journal Article %A Miklós Bóna %T A combinatorial proof of the log-concavity of a famous sequence counting permutations %J The electronic journal of combinatorics %D 2004 %V 11 %N 2 %U http://geodesic.mathdoc.fr/articles/10.37236/1889/ %R 10.37236/1889 %F 10_37236_1889