The $(t,q)$-analogs of secant and tangent numbers.

Foata, Dominique, and Han, Guo-Niu. "The -analogs of secant and tangent numbers.." The Electronic Journal of Combinatorics [electronic only] 18.2 (2011): Research Paper P7, 16 p., electronic only-Research Paper P7, 16 p., electronic only. <http://eudml.org/doc/224888>.

@article{Foata2011,
author = {Foata, Dominique, Han, Guo-Niu},
journal = {The Electronic Journal of Combinatorics [electronic only]},
keywords = {-secant numbers; -tangent numbers; -secant numbers; -tangent numbers; alternating permutations; pix; inverse major index; lec-statistic; inversion number; excedance number; -secant numbers; -tangent numbers; -secant numbers; -tangent numbers},
language = {eng},
number = {2},
pages = {Research Paper P7, 16 p., electronic only-Research Paper P7, 16 p., electronic only},
publisher = {Prof. André Kündgen, Deptartment of Mathematics, California State University San Marcos, San Marcos},
title = {The -analogs of secant and tangent numbers.},
url = {http://eudml.org/doc/224888},
volume = {18},
year = {2011},
}

TY - JOUR
AU - Foata, Dominique
AU - Han, Guo-Niu
TI - The -analogs of secant and tangent numbers.
JO - The Electronic Journal of Combinatorics [electronic only]
PY - 2011
PB - Prof. André Kündgen, Deptartment of Mathematics, California State University San Marcos, San Marcos
VL - 18
IS - 2
SP - Research Paper P7, 16 p., electronic only
EP - Research Paper P7, 16 p., electronic only
LA - eng
KW - -secant numbers; -tangent numbers; -secant numbers; -tangent numbers; alternating permutations; pix; inverse major index; lec-statistic; inversion number; excedance number; -secant numbers; -tangent numbers; -secant numbers; -tangent numbers
UR - http://eudml.org/doc/224888
ER -