
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
In the sequence \\(\{a_n\}\\), \\(a_1=1\\), and it satisfies \\(a_n-a_{n-1}=n(n > 1)\\).  
(Ⅰ) Find \\(a_2\\), \\(a_3\\), and the general formula for the sequence \\(\{a_n\}\\);  
(Ⅱ) Let \\(b_n= \dfrac {1}{a_n}\\), find the sum of the first \\(n\\) terms of the sequence \\(\{b_n\}\\), \\(S_n\\).

Present the answer in LaTex format: \boxed{Your answer}
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