A-M baby

Task/Hofstadter-Q-sequence/JavaScript/hofstadter-q-sequence.js

@@ -0,0 +1,18 @@
+var hofstadterQ = function() {
+   var memo = [1,1,1];
+   var Q    = function (n) {
+      var result = memo[n];
+      if (typeof result !== 'number') {
+         result  = Q(n - Q(n-1)) + Q(n - Q(n-2));
+         memo[n] = result;
+      }
+      return result;
+   };
+   return Q;
+}();
+
+for (var i = 1; i <=10; i += 1) {
+   console.log('Q('+ i +') = ' + hofstadterQ(i));
+}
+
+console.log('Q(1000) = ' + hofstadterQ(1000));