Catalan numbers: Difference between revisions

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=={{header|langur}}==
{{trans|Perl}}
<syntaxhighlight lang="langur">val .factorial = ffn(.x) if(.x < 2: 1; .x x self(.x - 1))
 
val .catalan = ffn(.n) .factorial(2 x .n) / .factorial(.n+1) / .factorial(.n)
 
for .i in 0..15 {
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