10 lines
411 B
PowerShell
10 lines
411 B
PowerShell
function Catalan([uint64]$m) {
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function fact([bigint]$n) {
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if($n -lt 2) {[bigint]::one}
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else{2..$n | foreach -Begin {$prod = [bigint]::one} -Process {$prod = [bigint]::Multiply($prod,$_)} -End {$prod}}
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}
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$fact = fact $m
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$fact1 = [bigint]::Multiply($m+1,$fact)
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[bigint]::divide((fact (2*$m)), [bigint]::Multiply($fact,$fact1))
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}
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0..15 | foreach {"catalan($_): $(catalan $_)"}
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