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Find a formula for the general term `a_n` of the sequence assuming the pattern of the first few terms continues.

`{ 12, 16, 20, 24, 28, ...}`

Assume the first term is `a_1`.

`a_n` =

Assume the first term is `a_1`.

`a_n` =

Get help:

Box 1: Enter your answer as an expression. Example: 3x^2+1, x/5, (a+b)/c

Be sure your variables match those in the question

`4*n+8`