$\"\"$

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The sequence is $\"\"$ .

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1st term

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$\"\"$ (Substitute n = 1)

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$\"\"$ (Simplify)

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2nd term

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$\"\"$ (Substitute n = 2)

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$\"\"$ (Simplify) $\"\"$

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3rd term

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$\"\"$ (Substitute n = 3)

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$\"\"$ (Simplify)

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4th term

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$\"\"$ (Substitute n = 4)

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$\"\"$ (Simplify)

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5th term

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$\"\"$ (Substitute n = 5)

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$\"\"$ (Simplify) $\"\"$

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The first five terms are $\"\"$ , 1, 5, 9 and 13.