<|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
 In a sequence of positive numbers, each term after the first two terms is the sum of all of the previous terms. If the second term is 2 and the sixth term is 56, calculate the value of the first term \( a \). Express your answer as a positive integer. 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
5
In a sequence of positive numbers, each term after the first two terms is the sum of all of the previous terms. If the second term is 2 and the sixth term is 56, calculate the value of the first term \( a \). Express your answer as a positive integer.
test