Catalan numbers: Difference between revisions

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(Added PowerShell)
Line 2,177:
=={{header|Oforth}}==
 
<lang Oforth>: catalan(n) { n ifZero: [ 1 ] else: [ catalan(n 1 -) 2 n * 1 - * 2 * n 1 + / ] };</lang>
 
{{out}}
<pre>
seqFrom(0, 15) map(#catalan) println.
[1, 1, 2, 5, 14, 42, 132, 429, 1430, 4862, 16796, 58786, 208012, 742900, 2674440, 9694845]
</pre>
1,015

edits