Geodesic
André Permutation Calculus: a Twin Seidel Matrix Sequence
Séminaire lotharingien de combinatoire, Tome 73 (2015-2016)

Voir la notice de l'acte provenant de la source Séminaire Lotharingien de Combinatoire website

Entringer numbers occur in the André permutation combinatorial set-up under several forms. This leads to the construction of a matrix refinement of the tangent (respectively secant) numbers. Furthermore, closed expressions for the three-variate exponential generating functions for pairs of so-called Entringerian statistics are derived. 

@article{SLC_2015-2016_73_a4,
     author = {Dominique Foata and Guo-Niu Han},
     title = {Andr\'e {Permutation} {Calculus:} a {Twin} {Seidel} {Matrix} {Sequence}},
     journal = {S\'eminaire lotharingien de combinatoire},
     publisher = {mathdoc},
     volume = {73},
     year = {2015-2016},
     url = {http://geodesic.mathdoc.fr/item/SLC_2015-2016_73_a4/}
}
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Dominique Foata; Guo-Niu Han. André Permutation Calculus: a Twin Seidel Matrix Sequence. Séminaire lotharingien de combinatoire, Tome 73 (2015-2016). http://geodesic.mathdoc.fr/item/SLC_2015-2016_73_a4/