
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]


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Given an arithmetic sequence {a<sub>n</sub>} with a common difference of 2, the sum of the first n terms is S<sub>n</sub>, and a<sub>3</sub> + S<sub>3</sub> = 18.
(Ⅰ) Find the general term formula for the sequence {a<sub>n</sub>};
(Ⅱ) Find the sum of the first n terms, T<sub>n</sub>, for the sequence { $$\frac {1}{S_{n}}$$}.

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