fixed

Author: Rishabh Bafna

maths/series/catalan_numbers.py

@@ -9,6 +9,8 @@
 """
 
 from __future__ import annotations
+import doctest
+
 
 def catalan_numbers(count: int) -> list[int]:
     """
@@ -72,4 +74,4 @@ def catalan_numbers(count: int) -> list[int]:
         else:
             print(f"The first {num} Catalan numbers are: {catalan_numbers(num)}")
     except ValueError:
-        print("Invalid input. Please enter an integer.")
+        print("Invalid input. Please enter an integer.")