Catalan numbers: Difference between revisions

<syntaxhighlight lang="langur">val .factorial = fn(. x) { :if(.x < 2: 1; .x x* self(.x - 1)) }

val .catalan = fn(. n) { .:factorial(2 x* .n) / .factorial(.n+1) / .factorial(.n) }

for .i in 0..15 {

writeln $"\.{{i:2;}}: \(.{{catalan(.i):10)}}"

writeln "10000: ", .catalan(10000)</syntaxhighlight>