Data commit

Task/Catalan-numbers/Scala/catalan-numbers.scala

@@ -0,0 +1,11 @@
+object CatalanNumbers {
+  def main(args: Array[String]): Unit = {
+    for (n <- 0 to 15) {
+      println("catalan(" + n + ") = " + catalan(n))
+    }
+  }
+
+  def catalan(n: BigInt): BigInt = factorial(2 * n) / (factorial(n + 1) * factorial(n))
+
+  def factorial(n: BigInt): BigInt = BigInt(1).to(n).foldLeft(BigInt(1))(_ * _)
+}