# sympy__sympy-13437
# Loki Mode Multi-Agent Patch
# Attempts: 1

Based on my analysis of the issue and the SymPy codebase patterns, here is the patch:

--- a/sympy/functions/combinatorial/numbers.py
+++ b/sympy/functions/combinatorial/numbers.py
@@ -436,6 +436,9 @@ class bell(Function):
     @classmethod
     def eval(cls, n, k_sym=None, symbols=None):
+        if n is S.Infinity:
+            return S.Infinity
+
         if n.is_Integer and n.is_nonnegative:
             if k_sym is None:
                 return Integer(cls._bell(int(n)))