The (t,q)-analogs of secant and tangent numbers.
Foata, Dominique ; Han, Guo-Niu
The Electronic Journal of Combinatorics [electronic only], Tome 18 (2011), / Harvested from The Electronic Library of Mathematics
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Publié le : 2011-01-01
EUDML-ID : urn:eudml:doc:224888 
@article{05903055,
     title = {The },
     journal = {The Electronic Journal of Combinatorics [electronic only]},
     volume = {18},
     year = {2011},
     zbl = {1233.05041},
     language = {en},
     url = {http://dml.mathdoc.fr/item/05903055}
}

Foata, Dominique; Han, Guo-Niu. The . The Electronic Journal of Combinatorics [electronic only], Tome 18 (2011) . http://gdmltest.u-ga.fr/item/05903055/