Analyze the increments between successive elements:
\[
6 - 3 = 3, \quad 11 - 6 = 5, \quad 18 - 11 = 7, \quad 27 - 18 = 9
\]
The differences form an arithmetic progression: 3, 5, 7, 9... with a common difference of 2. The next increment will be 9 + 2 = 11.
Consequently, the subsequent term is:
\[
27 + 11 = 36
\]
Answer: \( \boxed{36} \)