Add tasks for all the new languages

Task/Bernoulli-numbers/Sidef/bernoulli-numbers-1.sidef

@@ -0,0 +1,22 @@
+func bernoulli_number{};     # must be declared before first used
+
+func bern_helper(n, k) {
+    binomial(n, k) * (bernoulli_number(k) / (n - k + 1));
+}
+
+func bern_diff(n, k, d) {
+    n < k ? d : bern_diff(n, k + 1, d - bern_helper(n + 1, k));
+}
+
+bernoulli_number = func(n) is cached {
+
+    n.is_one && return 1/2;
+    n.is_odd && return   0;
+
+    n > 0 ? bern_diff(n - 1, 0, 1) : 1;
+}
+
+range(0, 60).each { |i|
+    var num = bernoulli_number(i) || next;
+    printf("B(%2d) = %44s / %s\n", i, num.parts);
+}

Task/Bernoulli-numbers/Sidef/bernoulli-numbers-2.sidef

@@ -0,0 +1,13 @@
+func bernoulli_print {
+    var a = []
+    range(0, 60).each { |m|
+        a << (m+1 -> inv)
+        m.downto(1).each { |j|
+            (a[j-1] -= a[j]) *= j
+        }
+        a[0] || next
+        printf("B(%2d) = %44s / %s\n", m, a[0].parts)
+    }
+}
+
+bernoulli_print()