<|im_start|>system
You are a helpful assistant. You first think about the reasoning process in the mind and then provide the user with the answer. You should try to truely solve the question by yourself without cheating.  <|im_end|>
<|im_start|>user
 From the numbers 1, 2, 3, ..., 100, select any 3 different numbers such that they form an arithmetic sequence in their original order. There are a total of     different ways to do this. Show your work in <think> </think> tags. And return the final answer in <answer> </answer> tags.<|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>
user
2450
From the numbers 1, 2, 3, ..., 100, select any 3 different numbers such that they form an arithmetic sequence in their original order. There are a total of     different ways to do this.
test