diff --git a/lib/newman_conway.py b/lib/newman_conway.py
index 7f5341a..5530c83 100644
--- a/lib/newman_conway.py
+++ b/lib/newman_conway.py
@@ -1,6 +1,18 @@
 def newman_conway(num):
     """ Returns a list of the Newman Conway numbers for the given value.
-        Time Complexity: ?
-        Space Complexity: ?
+        Time Complexity: On
+        Space Complexity: On
     """
-    pass
+    arr = [0, 1, 1]
+    if num < 1:
+        raise ValueError
+    if num == 1:
+        return '1'
+
+    for i in range(3, num + 1):
+        num = arr[arr[i-1]]+arr[i-arr[i-1]]
+        arr.append(num)
+    arr.pop(0)
+
+    result = [str(i) for i in arr]
+    return " ".join(result)
\ No newline at end of file