Catalan numbers: Difference between revisions
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→{{header|Fōrmulæ}}
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=={{header|Fōrmulæ}}==
{{FormulaeEntry|page=https://formulae.org/?script=examples/Catalan_numbers}}
=={{header|GAP}}==
<syntaxhighlight lang="gap">Catalan1 := n -> Binomial(2*n, n) - Binomial(2*n, n - 1);
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