The sequence of odd numbers 1, 3, 5, 7, and so on, is an arithmetic sequence, with common difference 2.  Therefore, the $2003^{\text{rd}}$ term is $1+2002\cdot2=\boxed{4005}$.
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
What is the 2003rd term of the sequence of odd numbers 1, 3, 5, 7, $\dots$?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
4005
What is the 2003rd term of the sequence of odd numbers 1, 3, 5, 7, $\dots$?
test