\(A_2=A_1+2\\ A_3=A_2\cdot(-4)\\ A_4=A_3+2\\ A_5=A_4\cdot(-4)\\ \)
For the next term, you take 120 and add two to get 122.
Then, you multiply by -4 to get -488.
Finally, you add two again to get -486.
The next three terms in order are 122, -488, -486.