$\"\"$

\

The formula for recursively defined sequence is $\"\"$ .

\

The first term of the sequence is $\"\"$ .

\

Find the first five terms.

\

For $\"\"$ , $\"\"$ .

\

Substitute $\"\"$ .

\

$\"\"$ .

\

For $\"\"$ , $\"\"$ .

\

Substitute $\"\"$ .

\

$\"\"$ .

\

For $\"\"$ , $\"\"$ .

\

Substitute $\"\"$ .

\

$\"\"$ .

\

For $\"\"$ , $\"\"$ .

\

Substitute $\"\"$ .

\

$\"\"$ .

\

Therefore, the first five numbers are $\"\"$ .

\

$\"\"$

\

The first five numbers are $\"\"$ .