Data commit

Task/Bell-numbers/Go/bell-numbers.go

@@ -0,0 +1,37 @@
+package main
+
+import (
+    "fmt"
+    "math/big"
+)
+
+func bellTriangle(n int) [][]*big.Int {
+    tri := make([][]*big.Int, n)
+    for i := 0; i < n; i++ {
+        tri[i] = make([]*big.Int, i)
+        for j := 0; j < i; j++ {
+            tri[i][j] = new(big.Int)
+        }
+    }
+    tri[1][0].SetUint64(1)
+    for i := 2; i < n; i++ {
+        tri[i][0].Set(tri[i-1][i-2])
+        for j := 1; j < i; j++ {
+            tri[i][j].Add(tri[i][j-1], tri[i-1][j-1])
+        }
+    }
+    return tri
+}
+
+func main() {
+    bt := bellTriangle(51)
+    fmt.Println("First fifteen and fiftieth Bell numbers:")
+    for i := 1; i <= 15; i++ {
+        fmt.Printf("%2d: %d\n", i, bt[i][0])
+    }
+    fmt.Println("50:", bt[50][0])
+    fmt.Println("\nThe first ten rows of Bell's triangle:")
+    for i := 1; i <= 10; i++ {
+        fmt.Println(bt[i])
+    }
+}