Catalan numbers: Difference between revisions

=={{header|Quackery}}==

<lang Quackery> [ 1 over times [ over i 1+ + * ] nip ] is 2n!/n! ( n --> n )

[ times [ i 1+ / ] ] is /n! ( n --> n )

[ dup 2n!/n! swap 1+ /n! ] is catalan ( n --> n )

15 times [ i^ dup echo say " : " catalan echo cr ]</lang>

{{out}}

<pre>0 : 1

1 : 1

2 : 2

3 : 5

4 : 14

5 : 42

6 : 132

7 : 429

8 : 1430

9 : 4862

10 : 16796

11 : 58786

12 : 208012

13 : 742900

14 : 2674440

</pre>