Geodesic
On Catalan numbers
The Teaching of Mathematics, XVIII (2015) no. 1, p. 16 .

Voir la notice de l'article provenant de la source eLibrary of Mathematical Institute of the Serbian Academy of Sciences and Arts

In this article we introduce one of the most frequently encountered sequences in mathematics, the sequence of Catalan numbers. The numerous and various occurrences and applications in combinatorial problems as well as their relations with other famous numerical sequences make Catalan numbers very suitable for creative teaching of mathematics at all levels.
Classification : 97K20 K25
Keywords: Catalan numbers, binary trees, associahedron, permutations. 
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Tanja Stojadinović. On Catalan numbers. The Teaching of Mathematics, XVIII (2015) no. 1, p. 16 . http://geodesic.mathdoc.fr/item/TM2_2015_XVIII_1_a1/