Trees, permutations and the tangent function

2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/66855This is a report on a talk to high school mathematics students. It gives some combinatorial connections for the entries of the boustrophedon triangle whose sides are the Taylor coefficients for the tangent and secant functions.9 pages, pdf file of MacWrite documentHistory and OverviewCombinatorics41A58Trees, permutations and the tangent functiontext